content: /*
   * Copyright (C) 2006 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package android.provider;
  
  import static android.provider.SettingsValidators.ANY_INTEGER_VALIDATOR;
  import static android.provider.SettingsValidators.ANY_STRING_VALIDATOR;
  import static android.provider.SettingsValidators.BOOLEAN_VALIDATOR;
  import static android.provider.SettingsValidators.COMPONENT_NAME_VALIDATOR;
  import static android.provider.SettingsValidators.LENIENT_IP_ADDRESS_VALIDATOR;
  import static android.provider.SettingsValidators.LOCALE_VALIDATOR;
  import static android.provider.SettingsValidators.NON_NEGATIVE_INTEGER_VALIDATOR;
  import static android.provider.SettingsValidators.NULLABLE_COMPONENT_NAME_VALIDATOR;
  import static android.provider.SettingsValidators.PACKAGE_NAME_VALIDATOR;
  import static android.provider.SettingsValidators.URI_VALIDATOR;
  
  import android.Manifest;
  import android.annotation.IntDef;
  import android.annotation.IntRange;
  import android.annotation.NonNull;
  import android.annotation.Nullable;
  import android.annotation.RequiresPermission;
  import android.annotation.SdkConstant;
  import android.annotation.SdkConstant.SdkConstantType;
  import android.annotation.SystemApi;
  import android.annotation.TestApi;
  import android.annotation.UnsupportedAppUsage;
  import android.annotation.UserIdInt;
  import android.app.ActivityThread;
  import android.app.AppOpsManager;
  import android.app.Application;
  import android.app.NotificationChannel;
  import android.app.NotificationManager;
  import android.app.SearchManager;
  import android.app.WallpaperManager;
  import android.content.ComponentName;
  import android.content.ContentResolver;
  import android.content.ContentValues;
  import android.content.Context;
  import android.content.IContentProvider;
  import android.content.Intent;
  import android.content.pm.ActivityInfo;
  import android.content.pm.PackageManager;
  import android.content.pm.ResolveInfo;
  import android.content.res.Configuration;
  import android.content.res.Resources;
  import android.database.Cursor;
  import android.database.SQLException;
  import android.hardware.display.ColorDisplayManager;
  import android.location.LocationManager;
  import android.media.AudioFormat;
  import android.net.ConnectivityManager;
  import android.net.NetworkScoreManager;
  import android.net.Uri;
  import android.net.wifi.WifiManager;
  import android.os.BatteryManager;
  import android.os.Binder;
  import android.os.Build.VERSION_CODES;
  import android.os.Bundle;
  import android.os.DropBoxManager;
  import android.os.IBinder;
  import android.os.LocaleList;
  import android.os.PowerManager.AutoPowerSaveModeTriggers;
  import android.os.Process;
  import android.os.RemoteException;
  import android.os.ResultReceiver;
  import android.os.ServiceManager;
  import android.os.UserHandle;
  import android.provider.SettingsValidators.Validator;
  import android.speech.tts.TextToSpeech;
  import android.telephony.SubscriptionManager;
  import android.text.TextUtils;
  import android.util.AndroidException;
  import android.util.ArrayMap;
  import android.util.ArraySet;
  import android.util.Log;
  import android.util.MemoryIntArray;
  import android.view.Display;
  import android.view.inputmethod.InputMethodSystemProperty;
  
  import com.android.internal.annotations.GuardedBy;
  import com.android.internal.widget.ILockSettings;
  
  import java.io.IOException;
  import java.lang.annotation.Retention;
  import java.lang.annotation.RetentionPolicy;
  import java.net.URISyntaxException;
  import java.text.SimpleDateFormat;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Locale;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * The Settings provider contains global system-level device preferences.
   */
  public final class Settings {
  
      // Intent actions for Settings
  
      /**
       * Activity Action: Show system settings.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_SETTINGS = "android.settings.SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of APNs.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * <p class="note">
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APN_SETTINGS = "android.settings.APN_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of current location
       * sources.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_LOCATION_SOURCE_SETTINGS =
              "android.settings.LOCATION_SOURCE_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of location controller extra package.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SystemApi
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_LOCATION_CONTROLLER_EXTRA_PACKAGE_SETTINGS =
              "android.settings.LOCATION_CONTROLLER_EXTRA_PACKAGE_SETTINGS";
  
      /**
       * Activity Action: Show scanning settings to allow configuration of Wi-Fi
       * and Bluetooth scanning settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_LOCATION_SCANNING_SETTINGS =
              "android.settings.LOCATION_SCANNING_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of users.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_USER_SETTINGS =
              "android.settings.USER_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of wireless controls
       * such as Wi-Fi, Bluetooth and Mobile networks.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_WIRELESS_SETTINGS =
              "android.settings.WIRELESS_SETTINGS";
  
      /**
       * Activity Action: Show tether provisioning activity.
       *
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: {@link ConnectivityManager#EXTRA_TETHER_TYPE} should be included to specify which type
       * of tethering should be checked. {@link ConnectivityManager#EXTRA_PROVISION_CALLBACK} should
       * contain a {@link ResultReceiver} which will be called back with a tether result code.
       * <p>
       * Output: The result of the provisioning check.
       * {@link ConnectivityManager#TETHER_ERROR_NO_ERROR} if successful,
       * {@link ConnectivityManager#TETHER_ERROR_PROVISION_FAILED} for failure.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_TETHER_PROVISIONING =
              "android.settings.TETHER_PROVISIONING_UI";
  
      /**
       * Activity Action: Show settings to allow entering/exiting airplane mode.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_AIRPLANE_MODE_SETTINGS =
              "android.settings.AIRPLANE_MODE_SETTINGS";
  
      /**
       * Activity Action: Show mobile data usage list.
       * <p>
       * Input: {@link EXTRA_NETWORK_TEMPLATE} and {@link EXTRA_SUB_ID} should be included to specify
       * how and what mobile data statistics should be collected.
       * <p>
       * Output: Nothing
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MOBILE_DATA_USAGE =
              "android.settings.MOBILE_DATA_USAGE";
  
      /** @hide */
      public static final String EXTRA_NETWORK_TEMPLATE = "network_template";
  
      /**
       * An int extra specifying a subscription ID.
       *
       * @see android.telephony.SubscriptionInfo#getSubscriptionId
       */
      public static final String EXTRA_SUB_ID = "android.provider.extra.SUB_ID";
  
      /**
       * Activity Action: Modify Airplane mode settings using a voice command.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard against this.
       * <p>
       * This intent MUST be started using
       * {@link android.service.voice.VoiceInteractionSession#startVoiceActivity
       * startVoiceActivity}.
       * <p>
       * Note: The activity implementing this intent MUST verify that
       * {@link android.app.Activity#isVoiceInteraction isVoiceInteraction} returns true before
       * modifying the setting.
       * <p>
       * Input: To tell which state airplane mode should be set to, add the
       * {@link #EXTRA_AIRPLANE_MODE_ENABLED} extra to this Intent with the state specified.
       * If the extra is not included, no changes will be made.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_VOICE_CONTROL_AIRPLANE_MODE =
              "android.settings.VOICE_CONTROL_AIRPLANE_MODE";
  
      /**
       * Activity Action: Show settings for accessibility modules.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ACCESSIBILITY_SETTINGS =
              "android.settings.ACCESSIBILITY_SETTINGS";
  
      /**
       * Activity Action: Show detail settings of a particular accessibility service.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard against this.
       * <p>
       * Input: {@link Intent#EXTRA_COMPONENT_NAME} must specify the accessibility service component
       * name to be shown.
       * <p>
       * Output: Nothing.
       * @hide
       **/
      @SystemApi
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ACCESSIBILITY_DETAILS_SETTINGS =
              "android.settings.ACCESSIBILITY_DETAILS_SETTINGS";
  
      /**
       * Activity Action: Show settings to control access to usage information.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_USAGE_ACCESS_SETTINGS =
              "android.settings.USAGE_ACCESS_SETTINGS";
  
      /**
       * Activity Category: Show application settings related to usage access.
       * <p>
       * An activity that provides a user interface for adjusting usage access related
       * preferences for its containing application. Optional but recommended for apps that
       * use {@link android.Manifest.permission#PACKAGE_USAGE_STATS}.
       * <p>
       * The activity may define meta-data to describe what usage access is
       * used for within their app with {@link #METADATA_USAGE_ACCESS_REASON}, which
       * will be displayed in Settings.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.INTENT_CATEGORY)
      public static final String INTENT_CATEGORY_USAGE_ACCESS_CONFIG =
              "android.intent.category.USAGE_ACCESS_CONFIG";
  
      /**
       * Metadata key: Reason for needing usage access.
       * <p>
       * A key for metadata attached to an activity that receives action
       * {@link #INTENT_CATEGORY_USAGE_ACCESS_CONFIG}, shown to the
       * user as description of how the app uses usage access.
       * <p>
       */
      public static final String METADATA_USAGE_ACCESS_REASON =
              "android.settings.metadata.USAGE_ACCESS_REASON";
  
      /**
       * Activity Action: Show settings to allow configuration of security and
       * location privacy.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_SECURITY_SETTINGS =
              "android.settings.SECURITY_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of trusted external sources
       *
       * Input: Optionally, the Intent's data URI can specify the application package name to
       * directly invoke the management GUI specific to the package name. For example
       * "package:com.my.app".
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MANAGE_UNKNOWN_APP_SOURCES =
              "android.settings.MANAGE_UNKNOWN_APP_SOURCES";
  
      /**
       * Activity Action: Show the "Open by Default" page in a particular application's details page.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard against this.
       * <p>
       * Input: The Intent's data URI specifies the application package name
       * to be shown, with the "package" scheme. That is "package:com.my.app".
       * <p>
       * Output: Nothing.
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APP_OPEN_BY_DEFAULT_SETTINGS =
              "com.android.settings.APP_OPEN_BY_DEFAULT_SETTINGS";
  
      /**
       * Activity Action: Show trusted credentials settings, opening to the user tab,
       * to allow management of installed credentials.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      @UnsupportedAppUsage
      public static final String ACTION_TRUSTED_CREDENTIALS_USER =
              "com.android.settings.TRUSTED_CREDENTIALS_USER";
  
      /**
       * Activity Action: Show dialog explaining that an installed CA cert may enable
       * monitoring of encrypted network traffic.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this. Add {@link #EXTRA_NUMBER_OF_CERTIFICATES} extra to indicate the
       * number of certificates.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MONITORING_CERT_INFO =
              "com.android.settings.MONITORING_CERT_INFO";
  
      /**
       * Activity Action: Show settings to allow configuration of privacy options.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_PRIVACY_SETTINGS =
              "android.settings.PRIVACY_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of VPN.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_VPN_SETTINGS =
              "android.settings.VPN_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of Wi-Fi.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_WIFI_SETTINGS =
              "android.settings.WIFI_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of a static IP
       * address for Wi-Fi.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard
       * against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_WIFI_IP_SETTINGS =
              "android.settings.WIFI_IP_SETTINGS";
  
      /**
       * Activity Action: Show setting page to process an Easy Connect (Wi-Fi DPP) QR code and start
       * configuration. This intent should be used when you want to use this device to take on the
       * configurator role for an IoT/other device. When provided with a valid DPP URI string Settings
       * will open a wifi selection screen for the user to indicate which network they would like
       * to configure the device specified in the DPP URI string for and carry them through the rest
       * of the flow for provisioning the device.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard
       * against this by checking WifiManager.isEasyConnectSupported();
       * <p>
       * Input: The Intent's data URI specifies bootstrapping information for authenticating and
       * provisioning the peer, with the "DPP" scheme.
       * <p>
       * Output: After {@code startActivityForResult}, the callback {@code onActivityResult} will have
       *         resultCode {@link android.app.Activity#RESULT_OK} if Wi-Fi Easy Connect configuration
       *         success and the user clicks 'Done' button.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_PROCESS_WIFI_EASY_CONNECT_URI =
              "android.settings.PROCESS_WIFI_EASY_CONNECT_URI";
  
      /**
       * Activity Action: Show settings to allow configuration of data and view data usage.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_DATA_USAGE_SETTINGS =
              "android.settings.DATA_USAGE_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of Bluetooth.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_BLUETOOTH_SETTINGS =
              "android.settings.BLUETOOTH_SETTINGS";
  
      /**
       * Activity action: Show Settings app search UI when this action is available for device.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APP_SEARCH_SETTINGS = "android.settings.APP_SEARCH_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of Assist Gesture.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ASSIST_GESTURE_SETTINGS =
              "android.settings.ASSIST_GESTURE_SETTINGS";
  
      /**
       * Activity Action: Show settings to enroll fingerprints, and setup PIN/Pattern/Pass if
       * necessary.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_FINGERPRINT_ENROLL =
              "android.settings.FINGERPRINT_ENROLL";
  
      /**
       * Activity Action: Show settings to allow configuration of cast endpoints.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_CAST_SETTINGS =
              "android.settings.CAST_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of date and time.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_DATE_SETTINGS =
              "android.settings.DATE_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of sound and volume.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_SOUND_SETTINGS =
              "android.settings.SOUND_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of display.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_DISPLAY_SETTINGS =
              "android.settings.DISPLAY_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of Night display.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NIGHT_DISPLAY_SETTINGS =
              "android.settings.NIGHT_DISPLAY_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of Dark theme.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_DARK_THEME_SETTINGS =
              "android.settings.DARK_THEME_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of locale.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_LOCALE_SETTINGS =
              "android.settings.LOCALE_SETTINGS";
  
      /**
       * Activity Action: Show settings to configure input methods, in particular
       * allowing the user to enable input methods.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_VOICE_INPUT_SETTINGS =
              "android.settings.VOICE_INPUT_SETTINGS";
  
      /**
       * Activity Action: Show settings to configure input methods, in particular
       * allowing the user to enable input methods.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_INPUT_METHOD_SETTINGS =
              "android.settings.INPUT_METHOD_SETTINGS";
  
      /**
       * Activity Action: Show settings to enable/disable input method subtypes.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * To tell which input method's subtypes are displayed in the settings, add
       * {@link #EXTRA_INPUT_METHOD_ID} extra to this Intent with the input method id.
       * If there is no extra in this Intent, subtypes from all installed input methods
       * will be displayed in the settings.
       *
       * @see android.view.inputmethod.InputMethodInfo#getId
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_INPUT_METHOD_SUBTYPE_SETTINGS =
              "android.settings.INPUT_METHOD_SUBTYPE_SETTINGS";
  
      /**
       * Activity Action: Show settings to manage the user input dictionary.
       * <p>
       * Starting with {@link android.os.Build.VERSION_CODES#KITKAT},
       * it is guaranteed there will always be an appropriate implementation for this Intent action.
       * In prior releases of the platform this was optional, so ensure you safeguard against it.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_USER_DICTIONARY_SETTINGS =
              "android.settings.USER_DICTIONARY_SETTINGS";
  
      /**
       * Activity Action: Show settings to configure the hardware keyboard.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_HARD_KEYBOARD_SETTINGS =
              "android.settings.HARD_KEYBOARD_SETTINGS";
  
      /**
       * Activity Action: Adds a word to the user dictionary.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: An extra with key <code>word</code> that contains the word
       * that should be added to the dictionary.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      @UnsupportedAppUsage
      public static final String ACTION_USER_DICTIONARY_INSERT =
              "com.android.settings.USER_DICTIONARY_INSERT";
  
      /**
       * Activity Action: Show settings to allow configuration of application-related settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APPLICATION_SETTINGS =
              "android.settings.APPLICATION_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of application
       * development-related settings.  As of
       * {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR1} this action is
       * a required part of the platform.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APPLICATION_DEVELOPMENT_SETTINGS =
              "android.settings.APPLICATION_DEVELOPMENT_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of quick launch shortcuts.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_QUICK_LAUNCH_SETTINGS =
              "android.settings.QUICK_LAUNCH_SETTINGS";
  
      /**
       * Activity Action: Show settings to manage installed applications.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MANAGE_APPLICATIONS_SETTINGS =
              "android.settings.MANAGE_APPLICATIONS_SETTINGS";
  
      /**
       * Activity Action: Show settings to manage all applications.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MANAGE_ALL_APPLICATIONS_SETTINGS =
              "android.settings.MANAGE_ALL_APPLICATIONS_SETTINGS";
  
      /**
       * Activity Action: Show screen for controlling which apps can draw on top of other apps.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Optionally, the Intent's data URI can specify the application package name to
       * directly invoke the management GUI specific to the package name. For example
       * "package:com.my.app".
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MANAGE_OVERLAY_PERMISSION =
              "android.settings.action.MANAGE_OVERLAY_PERMISSION";
  
      /**
       * Activity Action: Show screen for controlling which apps are allowed to write/modify
       * system settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Optionally, the Intent's data URI can specify the application package name to
       * directly invoke the management GUI specific to the package name. For example
       * "package:com.my.app".
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MANAGE_WRITE_SETTINGS =
              "android.settings.action.MANAGE_WRITE_SETTINGS";
  
      /**
       * Activity Action: Show screen for controlling app usage properties for an app.
       * Input: Intent's extra {@link android.content.Intent#EXTRA_PACKAGE_NAME} must specify the
       * application package name.
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APP_USAGE_SETTINGS =
              "android.settings.action.APP_USAGE_SETTINGS";
  
      /**
       * Activity Action: Show screen of details about a particular application.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: The Intent's data URI specifies the application package name
       * to be shown, with the "package" scheme.  That is "package:com.my.app".
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APPLICATION_DETAILS_SETTINGS =
              "android.settings.APPLICATION_DETAILS_SETTINGS";
  
      /**
       * Activity Action: Show list of applications that have been running
       * foreground services (to the user "running in the background").
       * <p>
       * Input: Extras "packages" is a string array of package names.
       * <p>
       * Output: Nothing.
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_FOREGROUND_SERVICES_SETTINGS =
              "android.settings.FOREGROUND_SERVICES_SETTINGS";
  
      /**
       * Activity Action: Show screen for controlling which apps can ignore battery optimizations.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * <p>
       * You can use {@link android.os.PowerManager#isIgnoringBatteryOptimizations
       * PowerManager.isIgnoringBatteryOptimizations()} to determine if an application is
       * already ignoring optimizations.  You can use
       * {@link #ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS} to ask the user to put you
       * on this list.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS =
              "android.settings.IGNORE_BATTERY_OPTIMIZATION_SETTINGS";
  
      /**
       * Activity Action: Ask the user to allow an app to ignore battery optimizations (that is,
       * put them on the whitelist of apps shown by
       * {@link #ACTION_IGNORE_BATTERY_OPTIMIZATION_SETTINGS}).  For an app to use this, it also
       * must hold the {@link android.Manifest.permission#REQUEST_IGNORE_BATTERY_OPTIMIZATIONS}
       * permission.
       * <p><b>Note:</b> most applications should <em>not</em> use this; there are many facilities
       * provided by the platform for applications to operate correctly in the various power
       * saving modes.  This is only for unusual applications that need to deeply control their own
       * execution, at the potential expense of the user's battery life.  Note that these applications
       * greatly run the risk of showing to the user as high power consumers on their device.</p>
       * <p>
       * Input: The Intent's data URI must specify the application package name
       * to be shown, with the "package" scheme.  That is "package:com.my.app".
       * <p>
       * Output: Nothing.
       * <p>
       * You can use {@link android.os.PowerManager#isIgnoringBatteryOptimizations
       * PowerManager.isIgnoringBatteryOptimizations()} to determine if an application is
       * already ignoring optimizations.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS =
              "android.settings.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS";
  
      /**
       * Activity Action: Open the advanced power usage details page of an associated app.
       * <p>
       * Input: Intent's data URI set with an application name, using the
       * "package" schema (like "package:com.my.app")
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_VIEW_ADVANCED_POWER_USAGE_DETAIL =
              "android.settings.VIEW_ADVANCED_POWER_USAGE_DETAIL";
  
      /**
       * Activity Action: Show screen for controlling background data
       * restrictions for a particular application.
       * <p>
       * Input: Intent's data URI set with an application name, using the
       * "package" schema (like "package:com.my.app").
       *
       * <p>
       * Output: Nothing.
       * <p>
       * Applications can also use {@link android.net.ConnectivityManager#getRestrictBackgroundStatus
       * ConnectivityManager#getRestrictBackgroundStatus()} to determine the
       * status of the background data restrictions for them.
       *
       * <p class="note">
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_IGNORE_BACKGROUND_DATA_RESTRICTIONS_SETTINGS =
              "android.settings.IGNORE_BACKGROUND_DATA_RESTRICTIONS_SETTINGS";
  
      /**
       * @hide
       * Activity Action: Show the "app ops" settings screen.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APP_OPS_SETTINGS =
              "android.settings.APP_OPS_SETTINGS";
  
      /**
       * Activity Action: Show settings for system update functionality.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_SYSTEM_UPDATE_SETTINGS =
              "android.settings.SYSTEM_UPDATE_SETTINGS";
  
      /**
       * Activity Action: Show settings for managed profile settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MANAGED_PROFILE_SETTINGS =
              "android.settings.MANAGED_PROFILE_SETTINGS";
  
      /**
       * Activity Action: Show settings to allow configuration of sync settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * The account types available to add via the add account button may be restricted by adding an
       * {@link #EXTRA_AUTHORITIES} extra to this Intent with one or more syncable content provider's
       * authorities. Only account types which can sync with that content provider will be offered to
       * the user.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_SYNC_SETTINGS =
              "android.settings.SYNC_SETTINGS";
  
      /**
       * Activity Action: Show add account screen for creating a new account.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * The account types available to add may be restricted by adding an {@link #EXTRA_AUTHORITIES}
       * extra to the Intent with one or more syncable content provider's authorities.  Only account
       * types which can sync with that content provider will be offered to the user.
       * <p>
       * Account types can also be filtered by adding an {@link #EXTRA_ACCOUNT_TYPES} extra to the
       * Intent with one or more account types.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ADD_ACCOUNT =
              "android.settings.ADD_ACCOUNT_SETTINGS";
  
      /**
       * Activity Action: Show settings for enabling or disabling data saver
       * <p></p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_DATA_SAVER_SETTINGS =
              "android.settings.DATA_SAVER_SETTINGS";
  
      /**
       * Activity Action: Show settings for selecting the network operator.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * The subscription ID of the subscription for which available network operators should be
       * displayed may be optionally specified with {@link #EXTRA_SUB_ID}.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NETWORK_OPERATOR_SETTINGS =
              "android.settings.NETWORK_OPERATOR_SETTINGS";
  
      /**
       * Activity Action: Show settings for selection of 2G/3G.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_DATA_ROAMING_SETTINGS =
              "android.settings.DATA_ROAMING_SETTINGS";
  
      /**
       * Activity Action: Show settings for internal storage.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_INTERNAL_STORAGE_SETTINGS =
              "android.settings.INTERNAL_STORAGE_SETTINGS";
      /**
       * Activity Action: Show settings for memory card storage.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MEMORY_CARD_SETTINGS =
              "android.settings.MEMORY_CARD_SETTINGS";
  
      /**
       * Activity Action: Show settings for global search.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_SEARCH_SETTINGS =
          "android.search.action.SEARCH_SETTINGS";
  
      /**
       * Activity Action: Show general device information settings (serial
       * number, software version, phone number, etc.).
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_DEVICE_INFO_SETTINGS =
          "android.settings.DEVICE_INFO_SETTINGS";
  
      /**
       * Activity Action: Show NFC settings.
       * <p>
       * This shows UI that allows NFC to be turned on or off.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing
       * @see android.nfc.NfcAdapter#isEnabled()
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NFC_SETTINGS = "android.settings.NFC_SETTINGS";
  
      /**
       * Activity Action: Show NFC Sharing settings.
       * <p>
       * This shows UI that allows NDEF Push (Android Beam) to be turned on or
       * off.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing
       * @see android.nfc.NfcAdapter#isNdefPushEnabled()
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NFCSHARING_SETTINGS =
          "android.settings.NFCSHARING_SETTINGS";
  
      /**
       * Activity Action: Show NFC Tap & Pay settings
       * <p>
       * This shows UI that allows the user to configure Tap&Pay
       * settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NFC_PAYMENT_SETTINGS =
          "android.settings.NFC_PAYMENT_SETTINGS";
  
      /**
       * Activity Action: Show Daydream settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @see android.service.dreams.DreamService
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_DREAM_SETTINGS = "android.settings.DREAM_SETTINGS";
  
      /**
       * Activity Action: Show Notification assistant settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @see android.service.notification.NotificationAssistantService
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NOTIFICATION_ASSISTANT_SETTINGS =
              "android.settings.NOTIFICATION_ASSISTANT_SETTINGS";
  
      /**
       * Activity Action: Show Notification listener settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @see android.service.notification.NotificationListenerService
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NOTIFICATION_LISTENER_SETTINGS
              = "android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS";
  
      /**
       * Activity Action: Show Do Not Disturb access settings.
       * <p>
       * Users can grant and deny access to Do Not Disturb configuration from here. Managed
       * profiles cannot grant Do Not Disturb access.
       * See {@link android.app.NotificationManager#isNotificationPolicyAccessGranted()} for more
       * details.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * <p class="note">
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NOTIFICATION_POLICY_ACCESS_SETTINGS
              = "android.settings.NOTIFICATION_POLICY_ACCESS_SETTINGS";
  
      /**
       * Activity Action: Show do not disturb setting page for app.
       * <p>
       * Users can grant and deny access to Do Not Disturb configuration for an app from here.
       * See {@link android.app.NotificationManager#isNotificationPolicyAccessGranted()} for more
       * details.
       * <p>
       * Input: Intent's data URI set with an application name, using the
       * "package" schema (like "package:com.my.app").
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SystemApi
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NOTIFICATION_POLICY_ACCESS_DETAIL_SETTINGS =
              "android.settings.NOTIFICATION_POLICY_ACCESS_DETAIL_SETTINGS";
  
      /**
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_CONDITION_PROVIDER_SETTINGS
              = "android.settings.ACTION_CONDITION_PROVIDER_SETTINGS";
  
      /**
       * Activity Action: Show settings for video captioning.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard
       * against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_CAPTIONING_SETTINGS = "android.settings.CAPTIONING_SETTINGS";
  
      /**
       * Activity Action: Show the top level print settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_PRINT_SETTINGS =
              "android.settings.ACTION_PRINT_SETTINGS";
  
      /**
       * Activity Action: Show Zen Mode configuration settings.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ZEN_MODE_SETTINGS = "android.settings.ZEN_MODE_SETTINGS";
  
      /**
       * Activity Action: Show Zen Mode visual effects configuration settings.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ZEN_MODE_BLOCKED_EFFECTS_SETTINGS =
              "android.settings.ZEN_MODE_BLOCKED_EFFECTS_SETTINGS";
  
      /**
       * Activity Action: Show Zen Mode onboarding activity.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ZEN_MODE_ONBOARDING = "android.settings.ZEN_MODE_ONBOARDING";
  
      /**
       * Activity Action: Show Zen Mode (aka Do Not Disturb) priority configuration settings.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ZEN_MODE_PRIORITY_SETTINGS
              = "android.settings.ZEN_MODE_PRIORITY_SETTINGS";
  
      /**
       * Activity Action: Show Zen Mode automation configuration settings.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ZEN_MODE_AUTOMATION_SETTINGS
              = "android.settings.ZEN_MODE_AUTOMATION_SETTINGS";
  
      /**
       * Activity Action: Modify do not disturb mode settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard against this.
       * <p>
       * This intent MUST be started using
       * {@link android.service.voice.VoiceInteractionSession#startVoiceActivity
       * startVoiceActivity}.
       * <p>
       * Note: The Activity implementing this intent MUST verify that
       * {@link android.app.Activity#isVoiceInteraction isVoiceInteraction}.
       * returns true before modifying the setting.
       * <p>
       * Input: The optional {@link #EXTRA_DO_NOT_DISTURB_MODE_MINUTES} extra can be used to indicate
       * how long the user wishes to avoid interruptions for. The optional
       * {@link #EXTRA_DO_NOT_DISTURB_MODE_ENABLED} extra can be to indicate if the user is
       * enabling or disabling do not disturb mode. If either extra is not included, the
       * user maybe asked to provide the value.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_VOICE_CONTROL_DO_NOT_DISTURB_MODE =
              "android.settings.VOICE_CONTROL_DO_NOT_DISTURB_MODE";
  
      /**
       * Activity Action: Show Zen Mode schedule rule configuration settings.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ZEN_MODE_SCHEDULE_RULE_SETTINGS
              = "android.settings.ZEN_MODE_SCHEDULE_RULE_SETTINGS";
  
      /**
       * Activity Action: Show Zen Mode event rule configuration settings.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ZEN_MODE_EVENT_RULE_SETTINGS
              = "android.settings.ZEN_MODE_EVENT_RULE_SETTINGS";
  
      /**
       * Activity Action: Show Zen Mode external rule configuration settings.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ZEN_MODE_EXTERNAL_RULE_SETTINGS
              = "android.settings.ZEN_MODE_EXTERNAL_RULE_SETTINGS";
  
      /**
       * Activity Action: Show the regulatory information screen for the device.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard
       * against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String
              ACTION_SHOW_REGULATORY_INFO = "android.settings.SHOW_REGULATORY_INFO";
  
      /**
       * Activity Action: Show Device Name Settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard
       * against this.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String DEVICE_NAME_SETTINGS = "android.settings.DEVICE_NAME";
  
      /**
       * Activity Action: Show pairing settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard
       * against this.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_PAIRING_SETTINGS = "android.settings.PAIRING_SETTINGS";
  
      /**
       * Activity Action: Show battery saver settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard
       * against this.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_BATTERY_SAVER_SETTINGS
              = "android.settings.BATTERY_SAVER_SETTINGS";
  
      /**
       * Activity Action: Modify Battery Saver mode setting using a voice command.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard against this.
       * <p>
       * This intent MUST be started using
       * {@link android.service.voice.VoiceInteractionSession#startVoiceActivity
       * startVoiceActivity}.
       * <p>
       * Note: The activity implementing this intent MUST verify that
       * {@link android.app.Activity#isVoiceInteraction isVoiceInteraction} returns true before
       * modifying the setting.
       * <p>
       * Input: To tell which state batter saver mode should be set to, add the
       * {@link #EXTRA_BATTERY_SAVER_MODE_ENABLED} extra to this Intent with the state specified.
       * If the extra is not included, no changes will be made.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_VOICE_CONTROL_BATTERY_SAVER_MODE =
              "android.settings.VOICE_CONTROL_BATTERY_SAVER_MODE";
  
      /**
       * Activity Action: Show Home selection settings. If there are multiple activities
       * that can satisfy the {@link Intent#CATEGORY_HOME} intent, this screen allows you
       * to pick your preferred activity.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_HOME_SETTINGS
              = "android.settings.HOME_SETTINGS";
  
      /**
       * Activity Action: Show Default apps settings.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you
       * safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MANAGE_DEFAULT_APPS_SETTINGS
              = "android.settings.MANAGE_DEFAULT_APPS_SETTINGS";
  
      /**
       * Activity Action: Show More default apps settings.
       * <p>
       * If a Settings activity handles this intent action, a "More defaults" entry will be shown in
       * the Default apps settings, and clicking it will launch that activity.
       * <p>
       * In some cases, a matching Activity may not exist, so ensure you safeguard against this.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      @SystemApi
      public static final String ACTION_MANAGE_MORE_DEFAULT_APPS_SETTINGS =
              "android.settings.MANAGE_MORE_DEFAULT_APPS_SETTINGS";
  
      /**
       * Activity Action: Show notification settings.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_NOTIFICATION_SETTINGS
              = "android.settings.NOTIFICATION_SETTINGS";
  
      /**
       * Activity Action: Show app listing settings, filtered by those that send notifications.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ALL_APPS_NOTIFICATION_SETTINGS =
              "android.settings.ALL_APPS_NOTIFICATION_SETTINGS";
  
      /**
       * Activity Action: Show notification settings for a single app.
       * <p>
       *     Input: {@link #EXTRA_APP_PACKAGE}, the package to display.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APP_NOTIFICATION_SETTINGS
              = "android.settings.APP_NOTIFICATION_SETTINGS";
  
      /**
       * Activity Action: Show notification settings for a single {@link NotificationChannel}.
       * <p>
       *     Input: {@link #EXTRA_APP_PACKAGE}, the package containing the channel to display.
       *     Input: {@link #EXTRA_CHANNEL_ID}, the id of the channel to display.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_CHANNEL_NOTIFICATION_SETTINGS
              = "android.settings.CHANNEL_NOTIFICATION_SETTINGS";
  
      /**
       * Activity Action: Show notification bubble settings for a single app.
       * See {@link NotificationManager#areBubblesAllowed()}.
       * <p>
       *     Input: {@link #EXTRA_APP_PACKAGE}, the package to display.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APP_NOTIFICATION_BUBBLE_SETTINGS
              = "android.settings.APP_NOTIFICATION_BUBBLE_SETTINGS";
  
      /**
       * Activity Extra: The package owner of the notification channel settings to display.
       * <p>
       * This must be passed as an extra field to the {@link #ACTION_CHANNEL_NOTIFICATION_SETTINGS}.
       */
      public static final String EXTRA_APP_PACKAGE = "android.provider.extra.APP_PACKAGE";
  
      /**
       * Activity Extra: The {@link NotificationChannel#getId()} of the notification channel settings
       * to display.
       * <p>
       * This must be passed as an extra field to the {@link #ACTION_CHANNEL_NOTIFICATION_SETTINGS}.
       */
      public static final String EXTRA_CHANNEL_ID = "android.provider.extra.CHANNEL_ID";
  
      /**
       * Activity Action: Show notification redaction settings.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_APP_NOTIFICATION_REDACTION
              = "android.settings.ACTION_APP_NOTIFICATION_REDACTION";
  
      /** @hide */
      @UnsupportedAppUsage
      public static final String EXTRA_APP_UID = "app_uid";
  
      /**
       * Activity Action: Show a dialog with disabled by policy message.
       * <p> If an user action is disabled by policy, this dialog can be triggered to let
       * the user know about this.
       * <p>
       * Input: {@link Intent#EXTRA_USER}: The user of the admin.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      // Intent#EXTRA_USER_ID can also be used
      @SystemApi
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_SHOW_ADMIN_SUPPORT_DETAILS
              = "android.settings.SHOW_ADMIN_SUPPORT_DETAILS";
  
      /**
       * Activity Action: Show a dialog for remote bugreport flow.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_SHOW_REMOTE_BUGREPORT_DIALOG
              = "android.settings.SHOW_REMOTE_BUGREPORT_DIALOG";
  
      /**
       * Activity Action: Show VR listener settings.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @see android.service.vr.VrListenerService
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_VR_LISTENER_SETTINGS
              = "android.settings.VR_LISTENER_SETTINGS";
  
      /**
       * Activity Action: Show Picture-in-picture settings.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_PICTURE_IN_PICTURE_SETTINGS
              = "android.settings.PICTURE_IN_PICTURE_SETTINGS";
  
      /**
       * Activity Action: Show Storage Manager settings.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_STORAGE_MANAGER_SETTINGS
              = "android.settings.STORAGE_MANAGER_SETTINGS";
  
      /**
       * Activity Action: Allows user to select current webview implementation.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_WEBVIEW_SETTINGS = "android.settings.WEBVIEW_SETTINGS";
  
      /**
       * Activity Action: Show enterprise privacy section.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * @hide
       */
      @SystemApi
      @TestApi
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_ENTERPRISE_PRIVACY_SETTINGS
              = "android.settings.ENTERPRISE_PRIVACY_SETTINGS";
  
      /**
       * Activity Action: Show screen that let user select its Autofill Service.
       * <p>
       * Input: Intent's data URI set with an application name, using the
       * "package" schema (like "package:com.my.app").
       *
       * <p>
       * Output: {@link android.app.Activity#RESULT_OK} if user selected an Autofill Service belonging
       * to the caller package.
       *
       * <p>
       * <b>NOTE: </b> Applications should call
       * {@link android.view.autofill.AutofillManager#hasEnabledAutofillServices()} and
       * {@link android.view.autofill.AutofillManager#isAutofillSupported()}, and only use this action
       * to start an activity if they return {@code false} and {@code true} respectively.
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_REQUEST_SET_AUTOFILL_SERVICE =
              "android.settings.REQUEST_SET_AUTOFILL_SERVICE";
  
      /**
       * Activity Action: Show screen for controlling which apps have access on volume directories.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing.
       * <p>
       * Applications typically use this action to ask the user to revert the "Do not ask again"
       * status of directory access requests made by
       * {@link android.os.storage.StorageVolume#createAccessIntent(String)}.
       * @deprecated use {@link #ACTION_APPLICATION_DETAILS_SETTINGS} to manage storage permissions
       *             for a specific application
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      @Deprecated
      public static final String ACTION_STORAGE_VOLUME_ACCESS_SETTINGS =
              "android.settings.STORAGE_VOLUME_ACCESS_SETTINGS";
  
  
      /**
       * Activity Action: Show screen that let user select enable (or disable) Content Capture.
       * <p>
       * Input: Nothing.
       *
       * <p>
       * Output: Nothing
       *
       * @hide
       */
      @SystemApi
      @TestApi
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_REQUEST_ENABLE_CONTENT_CAPTURE =
              "android.settings.REQUEST_ENABLE_CONTENT_CAPTURE";
  
      /**
       * Activity Action: Show screen that let user manage how Android handles URL resolution.
       * <p>
       * Input: Nothing.
       * <p>
       * Output: Nothing
       *
       * @hide
       */
      @SystemApi
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MANAGE_DOMAIN_URLS = "android.settings.MANAGE_DOMAIN_URLS";
  
      /**
       * Broadcast to trigger notification of asking user to enable MMS.
       * Need to specify {@link #EXTRA_ENABLE_MMS_DATA_REQUEST_REASON} and {@link #EXTRA_SUB_ID}.
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
      public static final String ACTION_ENABLE_MMS_DATA_REQUEST =
              "android.settings.ENABLE_MMS_DATA_REQUEST";
  
      /**
       * Integer value that specifies the reason triggering enable MMS data notification.
       * This must be passed as an extra field to the {@link #ACTION_ENABLE_MMS_DATA_REQUEST}.
       * Extra with value of EnableMmsDataReason interface.
       * @hide
       */
      public static final String EXTRA_ENABLE_MMS_DATA_REQUEST_REASON =
              "android.settings.extra.ENABLE_MMS_DATA_REQUEST_REASON";
  
      /** @hide */
      @Retention(RetentionPolicy.SOURCE)
      @IntDef(prefix = { "ENABLE_MMS_DATA_REQUEST_REASON_" }, value = {
              ENABLE_MMS_DATA_REQUEST_REASON_INCOMING_MMS,
              ENABLE_MMS_DATA_REQUEST_REASON_OUTGOING_MMS,
      })
      public @interface EnableMmsDataReason{}
  
      /**
       * Requesting to enable MMS data because there's an incoming MMS.
       * @hide
       */
      public static final int ENABLE_MMS_DATA_REQUEST_REASON_INCOMING_MMS = 0;
  
      /**
       * Requesting to enable MMS data because user is sending MMS.
       * @hide
       */
      public static final int ENABLE_MMS_DATA_REQUEST_REASON_OUTGOING_MMS = 1;
  
      /**
       * Activity Action: Show screen of a cellular subscription and highlight the
       * "enable MMS" toggle.
       * <p>
       * Input: {@link #EXTRA_SUB_ID}: Sub ID of the subscription.
       * <p>
       * Output: Nothing
       *
       * @hide
       */
      @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
      public static final String ACTION_MMS_MESSAGE_SETTING = "android.settings.MMS_MESSAGE_SETTING";
  
      // End of Intent actions for Settings
  
      /**
       * @hide - Private call() method on SettingsProvider to read from 'system' table.
       */
      public static final String CALL_METHOD_GET_SYSTEM = "GET_system";
  
      /**
       * @hide - Private call() method on SettingsProvider to read from 'secure' table.
       */
      public static final String CALL_METHOD_GET_SECURE = "GET_secure";
  
      /**
       * @hide - Private call() method on SettingsProvider to read from 'global' table.
       */
      public static final String CALL_METHOD_GET_GLOBAL = "GET_global";
  
      /**
       * @hide - Private call() method on SettingsProvider to read from 'config' table.
       */
      public static final String CALL_METHOD_GET_CONFIG = "GET_config";
  
      /**
       * @hide - Specifies that the caller of the fast-path call()-based flow tracks
       * the settings generation in order to cache values locally. If this key is
       * mapped to a <code>null</code> string extra in the request bundle, the response
       * bundle will contain the same key mapped to a parcelable extra which would be
       * an {@link android.util.MemoryIntArray}. The response will also contain an
       * integer mapped to the {@link #CALL_METHOD_GENERATION_INDEX_KEY} which is the
       * index in the array clients should use to lookup the generation. For efficiency
       * the caller should request the generation tracking memory array only if it
       * doesn't already have it.
       *
       * @see #CALL_METHOD_GENERATION_INDEX_KEY
       */
      public static final String CALL_METHOD_TRACK_GENERATION_KEY = "_track_generation";
  
      /**
       * @hide Key with the location in the {@link android.util.MemoryIntArray} where
       * to look up the generation id of the backing table. The value is an integer.
       *
       * @see #CALL_METHOD_TRACK_GENERATION_KEY
       */
      public static final String CALL_METHOD_GENERATION_INDEX_KEY = "_generation_index";
  
      /**
       * @hide Key with the settings table generation. The value is an integer.
       *
       * @see #CALL_METHOD_TRACK_GENERATION_KEY
       */
      public static final String CALL_METHOD_GENERATION_KEY = "_generation";
  
      /**
       * @hide - User handle argument extra to the fast-path call()-based requests
       */
      public static final String CALL_METHOD_USER_KEY = "_user";
  
      /**
       * @hide - Boolean argument extra to the fast-path call()-based requests
       */
      public static final String CALL_METHOD_MAKE_DEFAULT_KEY = "_make_default";
  
      /**
       * @hide - User handle argument extra to the fast-path call()-based requests
       */
      public static final String CALL_METHOD_RESET_MODE_KEY = "_reset_mode";
  
      /**
       * @hide - String argument extra to the fast-path call()-based requests
       */
      public static final String CALL_METHOD_TAG_KEY = "_tag";
  
      /**
       * @hide - String argument extra to the fast-path call()-based requests
       */
      public static final String CALL_METHOD_PREFIX_KEY = "_prefix";
  
      /** @hide - Private call() method to write to 'system' table */
      public static final String CALL_METHOD_PUT_SYSTEM = "PUT_system";
  
      /** @hide - Private call() method to write to 'secure' table */
      public static final String CALL_METHOD_PUT_SECURE = "PUT_secure";
  
      /** @hide - Private call() method to write to 'global' table */
      public static final String CALL_METHOD_PUT_GLOBAL= "PUT_global";
  
      /** @hide - Private call() method to write to 'configuration' table */
      public static final String CALL_METHOD_PUT_CONFIG = "PUT_config";
  
      /** @hide - Private call() method to delete from the 'system' table */
      public static final String CALL_METHOD_DELETE_SYSTEM = "DELETE_system";
  
      /** @hide - Private call() method to delete from the 'secure' table */
      public static final String CALL_METHOD_DELETE_SECURE = "DELETE_secure";
  
      /** @hide - Private call() method to delete from the 'global' table */
      public static final String CALL_METHOD_DELETE_GLOBAL = "DELETE_global";
  
      /** @hide - Private call() method to reset to defaults the 'configuration' table */
      public static final String CALL_METHOD_DELETE_CONFIG = "DELETE_config";
  
      /** @hide - Private call() method to reset to defaults the 'secure' table */
      public static final String CALL_METHOD_RESET_SECURE = "RESET_secure";
  
      /** @hide - Private call() method to reset to defaults the 'global' table */
      public static final String CALL_METHOD_RESET_GLOBAL = "RESET_global";
  
      /** @hide - Private call() method to reset to defaults the 'configuration' table */
      public static final String CALL_METHOD_RESET_CONFIG = "RESET_config";
  
      /** @hide - Private call() method to query the 'system' table */
      public static final String CALL_METHOD_LIST_SYSTEM = "LIST_system";
  
      /** @hide - Private call() method to query the 'secure' table */
      public static final String CALL_METHOD_LIST_SECURE = "LIST_secure";
  
      /** @hide - Private call() method to query the 'global' table */
      public static final String CALL_METHOD_LIST_GLOBAL = "LIST_global";
  
      /** @hide - Private call() method to reset to defaults the 'configuration' table */
      public static final String CALL_METHOD_LIST_CONFIG = "LIST_config";
  
      /**
       * Activity Extra: Limit available options in launched activity based on the given authority.
       * <p>
       * This can be passed as an extra field in an Activity Intent with one or more syncable content
       * provider's authorities as a String[]. This field is used by some intents to alter the
       * behavior of the called activity.
       * <p>
       * Example: The {@link #ACTION_ADD_ACCOUNT} intent restricts the account types available based
       * on the authority given.
       */
      public static final String EXTRA_AUTHORITIES = "authorities";
  
      /**
       * Activity Extra: Limit available options in launched activity based on the given account
       * types.
       * <p>
       * This can be passed as an extra field in an Activity Intent with one or more account types
       * as a String[]. This field is used by some intents to alter the behavior of the called
       * activity.
       * <p>
       * Example: The {@link #ACTION_ADD_ACCOUNT} intent restricts the account types to the specified
       * list.
       */
      public static final String EXTRA_ACCOUNT_TYPES = "account_types";
  
      public static final String EXTRA_INPUT_METHOD_ID = "input_method_id";
  
      /**
       * Activity Extra: The device identifier to act upon.
       * <p>
       * This can be passed as an extra field in an Activity Intent with a single
       * InputDeviceIdentifier. This field is used by some activities to jump straight into the
       * settings for the given device.
       * <p>
       * Example: The {@link #ACTION_INPUT_METHOD_SETTINGS} intent opens the keyboard layout
       * dialog for the given device.
       * @hide
       */
      public static final String EXTRA_INPUT_DEVICE_IDENTIFIER = "input_device_identifier";
  
      /**
       * Activity Extra: Enable or disable Airplane Mode.
       * <p>
       * This can be passed as an extra field to the {@link #ACTION_VOICE_CONTROL_AIRPLANE_MODE}
       * intent as a boolean to indicate if it should be enabled.
       */
      public static final String EXTRA_AIRPLANE_MODE_ENABLED = "airplane_mode_enabled";
  
      /**
       * Activity Extra: Enable or disable Battery saver mode.
       * <p>
       * This can be passed as an extra field to the {@link #ACTION_VOICE_CONTROL_BATTERY_SAVER_MODE}
       * intent as a boolean to indicate if it should be enabled.
       */
      public static final String EXTRA_BATTERY_SAVER_MODE_ENABLED =
              "android.settings.extra.battery_saver_mode_enabled";
  
      /**
       * Activity Extra: Enable or disable Do Not Disturb mode.
       * <p>
       * This can be passed as an extra field to the {@link #ACTION_VOICE_CONTROL_DO_NOT_DISTURB_MODE}
       * intent as a boolean to indicate if it should be enabled.
       */
      public static final String EXTRA_DO_NOT_DISTURB_MODE_ENABLED =
              "android.settings.extra.do_not_disturb_mode_enabled";
  
      /**
       * Activity Extra: How many minutes to enable do not disturb mode for.
       * <p>
       * This can be passed as an extra field to the {@link #ACTION_VOICE_CONTROL_DO_NOT_DISTURB_MODE}
       * intent to indicate how long do not disturb mode should be enabled for.
       */
      public static final String EXTRA_DO_NOT_DISTURB_MODE_MINUTES =
              "android.settings.extra.do_not_disturb_mode_minutes";
  
      /**
       * Reset mode: reset to defaults only settings changed by the
       * calling package. If there is a default set the setting
       * will be set to it, otherwise the setting will be deleted.
       * This is the only type of reset available to non-system clients.
       * @hide
       */
      @TestApi
      public static final int RESET_MODE_PACKAGE_DEFAULTS = 1;
  
      /**
       * Reset mode: reset all settings set by untrusted packages, which is
       * packages that aren't a part of the system, to the current defaults.
       * If there is a default set the setting will be set to it, otherwise
       * the setting will be deleted. This mode is only available to the system.
       * @hide
       */
      public static final int RESET_MODE_UNTRUSTED_DEFAULTS = 2;
  
      /**
       * Reset mode: delete all settings set by untrusted packages, which is
       * packages that aren't a part of the system. If a setting is set by an
       * untrusted package it will be deleted if its default is not provided
       * by the system, otherwise the setting will be set to its default.
       * This mode is only available to the system.
       * @hide
       */
      public static final int RESET_MODE_UNTRUSTED_CHANGES = 3;
  
      /**
       * Reset mode: reset all settings to defaults specified by trusted
       * packages, which is packages that are a part of the system, and
       * delete all settings set by untrusted packages. If a setting has
       * a default set by a system package it will be set to the default,
       * otherwise the setting will be deleted. This mode is only available
       * to the system.
       * @hide
       */
      public static final int RESET_MODE_TRUSTED_DEFAULTS = 4;
  
      /** @hide */
      @Retention(RetentionPolicy.SOURCE)
      @IntDef(prefix = { "RESET_MODE_" }, value = {
              RESET_MODE_PACKAGE_DEFAULTS,
              RESET_MODE_UNTRUSTED_DEFAULTS,
              RESET_MODE_UNTRUSTED_CHANGES,
              RESET_MODE_TRUSTED_DEFAULTS
      })
      public @interface ResetMode{}
  
      /**
       * Activity Extra: Number of certificates
       * <p>
       * This can be passed as an extra field to the {@link #ACTION_MONITORING_CERT_INFO}
       * intent to indicate the number of certificates
       * @hide
       */
      public static final String EXTRA_NUMBER_OF_CERTIFICATES =
              "android.settings.extra.number_of_certificates";
  
      private static final String JID_RESOURCE_PREFIX = "android";
  
      public static final String AUTHORITY = "settings";
  
      private static final String TAG = "Settings";
      private static final boolean LOCAL_LOGV = false;
  
      // Lock ensures that when enabling/disabling the master location switch, we don't end up
      // with a partial enable/disable state in multi-threaded situations.
      private static final Object mLocationSettingsLock = new Object();
  
      // Used in system server calling uid workaround in call()
      private static boolean sInSystemServer = false;
      private static final Object sInSystemServerLock = new Object();
  
      /** @hide */
      public static void setInSystemServer() {
          synchronized (sInSystemServerLock) {
              sInSystemServer = true;
          }
      }
  
      /** @hide */
      public static boolean isInSystemServer() {
          synchronized (sInSystemServerLock) {
              return sInSystemServer;
          }
      }
  
      public static class SettingNotFoundException extends AndroidException {
          public SettingNotFoundException(String msg) {
              super(msg);
          }
      }
  
      /**
       * Common base for tables of name/value settings.
       */
      public static class NameValueTable implements BaseColumns {
          public static final String NAME = "name";
          public static final String VALUE = "value";
  
          protected static boolean putString(ContentResolver resolver, Uri uri,
                  String name, String value) {
              // The database will take care of replacing duplicates.
              try {
                  ContentValues values = new ContentValues();
                  values.put(NAME, name);
                  values.put(VALUE, value);
                  resolver.insert(uri, values);
                  return true;
              } catch (SQLException e) {
                  Log.w(TAG, "Can't set key " + name + " in " + uri, e);
                  return false;
              }
          }
  
          public static Uri getUriFor(Uri uri, String name) {
              return Uri.withAppendedPath(uri, name);
          }
      }
  
      private static final class GenerationTracker {
          private final MemoryIntArray mArray;
          private final Runnable mErrorHandler;
          private final int mIndex;
          private int mCurrentGeneration;
  
          public GenerationTracker(@NonNull MemoryIntArray array, int index,
                  int generation, Runnable errorHandler) {
              mArray = array;
              mIndex = index;
              mErrorHandler = errorHandler;
              mCurrentGeneration = generation;
          }
  
          public boolean isGenerationChanged() {
              final int currentGeneration = readCurrentGeneration();
              if (currentGeneration >= 0) {
                  if (currentGeneration == mCurrentGeneration) {
                      return false;
                  }
                  mCurrentGeneration = currentGeneration;
              }
              return true;
          }
  
          public int getCurrentGeneration() {
              return mCurrentGeneration;
          }
  
          private int readCurrentGeneration() {
              try {
                  return mArray.get(mIndex);
              } catch (IOException e) {
                  Log.e(TAG, "Error getting current generation", e);
                  if (mErrorHandler != null) {
                      mErrorHandler.run();
                  }
              }
              return -1;
          }
  
          public void destroy() {
              try {
                  mArray.close();
              } catch (IOException e) {
                  Log.e(TAG, "Error closing backing array", e);
                  if (mErrorHandler != null) {
                      mErrorHandler.run();
                  }
              }
          }
      }
  
      private static final class ContentProviderHolder {
          private final Object mLock = new Object();
  
          @GuardedBy("mLock")
          private final Uri mUri;
          @GuardedBy("mLock")
          @UnsupportedAppUsage
          private IContentProvider mContentProvider;
  
          public ContentProviderHolder(Uri uri) {
              mUri = uri;
          }
  
          public IContentProvider getProvider(ContentResolver contentResolver) {
              synchronized (mLock) {
                  if (mContentProvider == null) {
                      mContentProvider = contentResolver
                              .acquireProvider(mUri.getAuthority());
                  }
                  return mContentProvider;
              }
          }
  
          public void clearProviderForTest() {
              synchronized (mLock) {
                  mContentProvider = null;
              }
          }
      }
  
      // Thread-safe.
      private static class NameValueCache {
          private static final boolean DEBUG = false;
  
          private static final String[] SELECT_VALUE_PROJECTION = new String[] {
                  Settings.NameValueTable.VALUE
          };
  
          private static final String NAME_EQ_PLACEHOLDER = "name=?";
  
          // Must synchronize on 'this' to access mValues and mValuesVersion.
          private final HashMap<String, String> mValues = new HashMap<>();
  
          private final Uri mUri;
          @UnsupportedAppUsage
          private final ContentProviderHolder mProviderHolder;
  
          // The method we'll call (or null, to not use) on the provider
          // for the fast path of retrieving settings.
          private final String mCallGetCommand;
          private final String mCallSetCommand;
  
          @GuardedBy("this")
          private GenerationTracker mGenerationTracker;
  
          public NameValueCache(Uri uri, String getCommand, String setCommand,
                  ContentProviderHolder providerHolder) {
              mUri = uri;
              mCallGetCommand = getCommand;
              mCallSetCommand = setCommand;
              mProviderHolder = providerHolder;
          }
  
          public boolean putStringForUser(ContentResolver cr, String name, String value,
                  String tag, boolean makeDefault, final int userHandle) {
              try {
                  Bundle arg = new Bundle();
                  arg.putString(Settings.NameValueTable.VALUE, value);
                  arg.putInt(CALL_METHOD_USER_KEY, userHandle);
                  if (tag != null) {
                      arg.putString(CALL_METHOD_TAG_KEY, tag);
                  }
                  if (makeDefault) {
                      arg.putBoolean(CALL_METHOD_MAKE_DEFAULT_KEY, true);
                  }
                  IContentProvider cp = mProviderHolder.getProvider(cr);
                  cp.call(cr.getPackageName(), mProviderHolder.mUri.getAuthority(),
                          mCallSetCommand, name, arg);
              } catch (RemoteException e) {
                  Log.w(TAG, "Can't set key " + name + " in " + mUri, e);
                  return false;
              }
              return true;
          }
  
          @UnsupportedAppUsage
          public String getStringForUser(ContentResolver cr, String name, final int userHandle) {
              final boolean isSelf = (userHandle == UserHandle.myUserId());
              int currentGeneration = -1;
              if (isSelf) {
                  synchronized (NameValueCache.this) {
                      if (mGenerationTracker != null) {
                          if (mGenerationTracker.isGenerationChanged()) {
                              if (DEBUG) {
                                  Log.i(TAG, "Generation changed for type:"
                                          + mUri.getPath() + " in package:"
                                          + cr.getPackageName() +" and user:" + userHandle);
                              }
                              mValues.clear();
                          } else if (mValues.containsKey(name)) {
                              return mValues.get(name);
                          }
                          if (mGenerationTracker != null) {
                              currentGeneration = mGenerationTracker.getCurrentGeneration();
                          }
                      }
                  }
              } else {
                  if (LOCAL_LOGV) Log.v(TAG, "get setting for user " + userHandle
                          + " by user " + UserHandle.myUserId() + " so skipping cache");
              }
  
              IContentProvider cp = mProviderHolder.getProvider(cr);
  
              // Try the fast path first, not using query().  If this
              // fails (alternate Settings provider that doesn't support
              // this interface?) then we fall back to the query/table
              // interface.
              if (mCallGetCommand != null) {
                  try {
                      Bundle args = null;
                      if (!isSelf) {
                          args = new Bundle();
                          args.putInt(CALL_METHOD_USER_KEY, userHandle);
                      }
                      boolean needsGenerationTracker = false;
                      synchronized (NameValueCache.this) {
                          if (isSelf && mGenerationTracker == null) {
                              needsGenerationTracker = true;
                              if (args == null) {
                                  args = new Bundle();
                              }
                              args.putString(CALL_METHOD_TRACK_GENERATION_KEY, null);
                              if (DEBUG) {
                                  Log.i(TAG, "Requested generation tracker for type: "+ mUri.getPath()
                                          + " in package:" + cr.getPackageName() +" and user:"
                                          + userHandle);
                              }
                          }
                      }
                      Bundle b;
                      // If we're in system server and in a binder transaction we need to clear the
                      // calling uid. This works around code in system server that did not call
                      // clearCallingIdentity, previously this wasn't needed because reading settings
                      // did not do permission checking but thats no longer the case.
                      // Long term this should be removed and callers should properly call
                      // clearCallingIdentity or use a ContentResolver from the caller as needed.
                      if (Settings.isInSystemServer() && Binder.getCallingUid() != Process.myUid()) {
                          final long token = Binder.clearCallingIdentity();
                          try {
                              b = cp.call(cr.getPackageName(), mProviderHolder.mUri.getAuthority(),
                                      mCallGetCommand, name, args);
                          } finally {
                              Binder.restoreCallingIdentity(token);
                          }
                      } else {
                          b = cp.call(cr.getPackageName(), mProviderHolder.mUri.getAuthority(),
                                  mCallGetCommand, name, args);
                      }
                      if (b != null) {
                          String value = b.getString(Settings.NameValueTable.VALUE);
                          // Don't update our cache for reads of other users' data
                          if (isSelf) {
                              synchronized (NameValueCache.this) {
                                  if (needsGenerationTracker) {
                                      MemoryIntArray array = b.getParcelable(
                                              CALL_METHOD_TRACK_GENERATION_KEY);
                                      final int index = b.getInt(
                                              CALL_METHOD_GENERATION_INDEX_KEY, -1);
                                      if (array != null && index >= 0) {
                                          final int generation = b.getInt(
                                                  CALL_METHOD_GENERATION_KEY, 0);
                                          if (DEBUG) {
                                              Log.i(TAG, "Received generation tracker for type:"
                                                      + mUri.getPath() + " in package:"
                                                      + cr.getPackageName() + " and user:"
                                                      + userHandle + " with index:" + index);
                                          }
                                          if (mGenerationTracker != null) {
                                              mGenerationTracker.destroy();
                                          }
                                          mGenerationTracker = new GenerationTracker(array, index,
                                                  generation, () -> {
                                              synchronized (NameValueCache.this) {
                                                  Log.e(TAG, "Error accessing generation"
                                                          + " tracker - removing");
                                                  if (mGenerationTracker != null) {
                                                      GenerationTracker generationTracker =
                                                              mGenerationTracker;
                                                      mGenerationTracker = null;
                                                      generationTracker.destroy();
                                                      mValues.clear();
                                                  }
                                              }
                                          });
                                      }
                                  }
                                  if (mGenerationTracker != null && currentGeneration ==
                                          mGenerationTracker.getCurrentGeneration()) {
                                      mValues.put(name, value);
                                  }
                              }
                          } else {
                              if (LOCAL_LOGV) Log.i(TAG, "call-query of user " + userHandle
                                      + " by " + UserHandle.myUserId()
                                      + " so not updating cache");
                          }
                          return value;
                      }
                      // If the response Bundle is null, we fall through
                      // to the query interface below.
                  } catch (RemoteException e) {
                      // Not supported by the remote side?  Fall through
                      // to query().
                  }
              }
  
              Cursor c = null;
              try {
                  Bundle queryArgs = ContentResolver.createSqlQueryBundle(
                          NAME_EQ_PLACEHOLDER, new String[]{name}, null);
                  // Same workaround as above.
                  if (Settings.isInSystemServer() && Binder.getCallingUid() != Process.myUid()) {
                      final long token = Binder.clearCallingIdentity();
                      try {
                          c = cp.query(cr.getPackageName(), mUri, SELECT_VALUE_PROJECTION, queryArgs,
                                  null);
                      } finally {
                          Binder.restoreCallingIdentity(token);
                      }
                  } else {
                      c = cp.query(cr.getPackageName(), mUri, SELECT_VALUE_PROJECTION, queryArgs,
                              null);
                  }
                  if (c == null) {
                      Log.w(TAG, "Can't get key " + name + " from " + mUri);
                      return null;
                  }
  
                  String value = c.moveToNext() ? c.getString(0) : null;
                  synchronized (NameValueCache.this) {
                      if(mGenerationTracker != null &&
                              currentGeneration == mGenerationTracker.getCurrentGeneration()) {
                          mValues.put(name, value);
                      }
                  }
                  if (LOCAL_LOGV) {
                      Log.v(TAG, "cache miss [" + mUri.getLastPathSegment() + "]: " +
                              name + " = " + (value == null ? "(null)" : value));
                  }
                  return value;
              } catch (RemoteException e) {
                  Log.w(TAG, "Can't get key " + name + " from " + mUri, e);
                  return null;  // Return null, but don't cache it.
              } finally {
                  if (c != null) c.close();
              }
          }
  
          public void clearGenerationTrackerForTest() {
              synchronized (NameValueCache.this) {
                  if (mGenerationTracker != null) {
                      mGenerationTracker.destroy();
                  }
                  mValues.clear();
                  mGenerationTracker = null;
              }
          }
      }
  
      /**
       * Checks if the specified context can draw on top of other apps. As of API
       * level 23, an app cannot draw on top of other apps unless it declares the
       * {@link android.Manifest.permission#SYSTEM_ALERT_WINDOW} permission in its
       * manifest, <em>and</em> the user specifically grants the app this
       * capability. To prompt the user to grant this approval, the app must send an
       * intent with the action
       * {@link android.provider.Settings#ACTION_MANAGE_OVERLAY_PERMISSION}, which
       * causes the system to display a permission management screen.
       *
       * @param context App context.
       * @return true if the specified context can draw on top of other apps, false otherwise
       */
      public static boolean canDrawOverlays(Context context) {
          return Settings.isCallingPackageAllowedToDrawOverlays(context, Process.myUid(),
                  context.getOpPackageName(), false);
      }
  
      /**
       * System settings, containing miscellaneous system preferences.  This
       * table holds simple name/value pairs.  There are convenience
       * functions for accessing individual settings entries.
       */
      public static final class System extends NameValueTable {
          // NOTE: If you add new settings here, be sure to add them to
          // com.android.providers.settings.SettingsProtoDumpUtil#dumpProtoSystemSettingsLocked.
  
          private static final float DEFAULT_FONT_SCALE = 1.0f;
  
          /**
           * The content:// style URL for this table
           */
          public static final Uri CONTENT_URI =
              Uri.parse("content://" + AUTHORITY + "/system");
  
          @UnsupportedAppUsage
          private static final ContentProviderHolder sProviderHolder =
                  new ContentProviderHolder(CONTENT_URI);
  
          @UnsupportedAppUsage
          private static final NameValueCache sNameValueCache = new NameValueCache(
                  CONTENT_URI,
                  CALL_METHOD_GET_SYSTEM,
                  CALL_METHOD_PUT_SYSTEM,
                  sProviderHolder);
  
          @UnsupportedAppUsage
          private static final HashSet<String> MOVED_TO_SECURE;
          static {
              MOVED_TO_SECURE = new HashSet<>(30);
              MOVED_TO_SECURE.add(Secure.ANDROID_ID);
              MOVED_TO_SECURE.add(Secure.HTTP_PROXY);
              MOVED_TO_SECURE.add(Secure.LOCATION_PROVIDERS_ALLOWED);
              MOVED_TO_SECURE.add(Secure.LOCK_BIOMETRIC_WEAK_FLAGS);
              MOVED_TO_SECURE.add(Secure.LOCK_PATTERN_ENABLED);
              MOVED_TO_SECURE.add(Secure.LOCK_PATTERN_VISIBLE);
              MOVED_TO_SECURE.add(Secure.LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED);
              MOVED_TO_SECURE.add(Secure.LOGGING_ID);
              MOVED_TO_SECURE.add(Secure.PARENTAL_CONTROL_ENABLED);
              MOVED_TO_SECURE.add(Secure.PARENTAL_CONTROL_LAST_UPDATE);
              MOVED_TO_SECURE.add(Secure.PARENTAL_CONTROL_REDIRECT_URL);
              MOVED_TO_SECURE.add(Secure.SETTINGS_CLASSNAME);
              MOVED_TO_SECURE.add(Secure.USE_GOOGLE_MAIL);
              MOVED_TO_SECURE.add(Secure.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON);
              MOVED_TO_SECURE.add(Secure.WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY);
              MOVED_TO_SECURE.add(Secure.WIFI_NUM_OPEN_NETWORKS_KEPT);
              MOVED_TO_SECURE.add(Secure.WIFI_ON);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_ACCEPTABLE_PACKET_LOSS_PERCENTAGE);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_AP_COUNT);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_DELAY_MS);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_ENABLED);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_TIMEOUT_MS);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_INITIAL_IGNORED_PING_COUNT);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_MAX_AP_CHECKS);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_ON);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_PING_COUNT);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_PING_DELAY_MS);
              MOVED_TO_SECURE.add(Secure.WIFI_WATCHDOG_PING_TIMEOUT_MS);
  
              // At one time in System, then Global, but now back in Secure
              MOVED_TO_SECURE.add(Secure.INSTALL_NON_MARKET_APPS);
          }
  
          @UnsupportedAppUsage
          private static final HashSet<String> MOVED_TO_GLOBAL;
          @UnsupportedAppUsage
          private static final HashSet<String> MOVED_TO_SECURE_THEN_GLOBAL;
          static {
              MOVED_TO_GLOBAL = new HashSet<>();
              MOVED_TO_SECURE_THEN_GLOBAL = new HashSet<>();
  
              // these were originally in system but migrated to secure in the past,
              // so are duplicated in the Secure.* namespace
              MOVED_TO_SECURE_THEN_GLOBAL.add(Global.ADB_ENABLED);
              MOVED_TO_SECURE_THEN_GLOBAL.add(Global.BLUETOOTH_ON);
              MOVED_TO_SECURE_THEN_GLOBAL.add(Global.DATA_ROAMING);
              MOVED_TO_SECURE_THEN_GLOBAL.add(Global.DEVICE_PROVISIONED);
              MOVED_TO_SECURE_THEN_GLOBAL.add(Global.USB_MASS_STORAGE_ENABLED);
              MOVED_TO_SECURE_THEN_GLOBAL.add(Global.HTTP_PROXY);
  
              // these are moving directly from system to global
              MOVED_TO_GLOBAL.add(Settings.Global.AIRPLANE_MODE_ON);
              MOVED_TO_GLOBAL.add(Settings.Global.AIRPLANE_MODE_RADIOS);
              MOVED_TO_GLOBAL.add(Settings.Global.AIRPLANE_MODE_TOGGLEABLE_RADIOS);
              MOVED_TO_GLOBAL.add(Settings.Global.AUTO_TIME);
              MOVED_TO_GLOBAL.add(Settings.Global.AUTO_TIME_ZONE);
              MOVED_TO_GLOBAL.add(Settings.Global.CAR_DOCK_SOUND);
              MOVED_TO_GLOBAL.add(Settings.Global.CAR_UNDOCK_SOUND);
              MOVED_TO_GLOBAL.add(Settings.Global.DESK_DOCK_SOUND);
              MOVED_TO_GLOBAL.add(Settings.Global.DESK_UNDOCK_SOUND);
              MOVED_TO_GLOBAL.add(Settings.Global.DOCK_SOUNDS_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.LOCK_SOUND);
              MOVED_TO_GLOBAL.add(Settings.Global.UNLOCK_SOUND);
              MOVED_TO_GLOBAL.add(Settings.Global.LOW_BATTERY_SOUND);
              MOVED_TO_GLOBAL.add(Settings.Global.POWER_SOUNDS_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.STAY_ON_WHILE_PLUGGED_IN);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_SLEEP_POLICY);
              MOVED_TO_GLOBAL.add(Settings.Global.MODE_RINGER);
              MOVED_TO_GLOBAL.add(Settings.Global.WINDOW_ANIMATION_SCALE);
              MOVED_TO_GLOBAL.add(Settings.Global.TRANSITION_ANIMATION_SCALE);
              MOVED_TO_GLOBAL.add(Settings.Global.ANIMATOR_DURATION_SCALE);
              MOVED_TO_GLOBAL.add(Settings.Global.FANCY_IME_ANIMATIONS);
              MOVED_TO_GLOBAL.add(Settings.Global.COMPATIBILITY_MODE);
              MOVED_TO_GLOBAL.add(Settings.Global.EMERGENCY_TONE);
              MOVED_TO_GLOBAL.add(Settings.Global.CALL_AUTO_RETRY);
              MOVED_TO_GLOBAL.add(Settings.Global.DEBUG_APP);
              MOVED_TO_GLOBAL.add(Settings.Global.WAIT_FOR_DEBUGGER);
              MOVED_TO_GLOBAL.add(Settings.Global.ALWAYS_FINISH_ACTIVITIES);
              MOVED_TO_GLOBAL.add(Settings.Global.TZINFO_UPDATE_CONTENT_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.TZINFO_UPDATE_METADATA_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.SELINUX_UPDATE_CONTENT_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.SELINUX_UPDATE_METADATA_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.SMS_SHORT_CODES_UPDATE_CONTENT_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.SMS_SHORT_CODES_UPDATE_METADATA_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.CERT_PIN_UPDATE_CONTENT_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.CERT_PIN_UPDATE_METADATA_URL);
          }
  
          /** @hide */
          public static void getMovedToGlobalSettings(Set<String> outKeySet) {
              outKeySet.addAll(MOVED_TO_GLOBAL);
              outKeySet.addAll(MOVED_TO_SECURE_THEN_GLOBAL);
          }
  
          /** @hide */
          public static void getMovedToSecureSettings(Set<String> outKeySet) {
              outKeySet.addAll(MOVED_TO_SECURE);
          }
  
          /** @hide */
          public static void getNonLegacyMovedKeys(HashSet<String> outKeySet) {
              outKeySet.addAll(MOVED_TO_GLOBAL);
          }
  
          /** @hide */
          public static void clearProviderForTest() {
              sProviderHolder.clearProviderForTest();
              sNameValueCache.clearGenerationTrackerForTest();
          }
  
          /**
           * Look up a name in the database.
           * @param resolver to access the database with
           * @param name to look up in the table
           * @return the corresponding value, or null if not present
           */
          public static String getString(ContentResolver resolver, String name) {
              return getStringForUser(resolver, name, resolver.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static String getStringForUser(ContentResolver resolver, String name,
                  int userHandle) {
              if (MOVED_TO_SECURE.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
                          + " to android.provider.Settings.Secure, returning read-only value.");
                  return Secure.getStringForUser(resolver, name, userHandle);
              }
              if (MOVED_TO_GLOBAL.contains(name) || MOVED_TO_SECURE_THEN_GLOBAL.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
                          + " to android.provider.Settings.Global, returning read-only value.");
                  return Global.getStringForUser(resolver, name, userHandle);
              }
              return sNameValueCache.getStringForUser(resolver, name, userHandle);
          }
  
          /**
           * Store a name/value pair into the database.
           * @param resolver to access the database with
           * @param name to store
           * @param value to associate with the name
           * @return true if the value was set, false on database errors
           */
          public static boolean putString(ContentResolver resolver, String name, String value) {
              return putStringForUser(resolver, name, value, resolver.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static boolean putStringForUser(ContentResolver resolver, String name, String value,
                  int userHandle) {
              if (MOVED_TO_SECURE.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
                          + " to android.provider.Settings.Secure, value is unchanged.");
                  return false;
              }
              if (MOVED_TO_GLOBAL.contains(name) || MOVED_TO_SECURE_THEN_GLOBAL.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
                          + " to android.provider.Settings.Global, value is unchanged.");
                  return false;
              }
              return sNameValueCache.putStringForUser(resolver, name, value, null, false, userHandle);
          }
  
          /**
           * Construct the content URI for a particular name/value pair,
           * useful for monitoring changes with a ContentObserver.
           * @param name to look up in the table
           * @return the corresponding content URI, or null if not present
           */
          public static Uri getUriFor(String name) {
              if (MOVED_TO_SECURE.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
                      + " to android.provider.Settings.Secure, returning Secure URI.");
                  return Secure.getUriFor(Secure.CONTENT_URI, name);
              }
              if (MOVED_TO_GLOBAL.contains(name) || MOVED_TO_SECURE_THEN_GLOBAL.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.System"
                          + " to android.provider.Settings.Global, returning read-only global URI.");
                  return Global.getUriFor(Global.CONTENT_URI, name);
              }
              return getUriFor(CONTENT_URI, name);
          }
  
          /**
           * Convenience function for retrieving a single system settings value
           * as an integer.  Note that internally setting values are always
           * stored as strings; this function converts the string to an integer
           * for you.  The default value will be returned if the setting is
           * not defined or not an integer.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid integer.
           */
          public static int getInt(ContentResolver cr, String name, int def) {
              return getIntForUser(cr, name, def, cr.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static int getIntForUser(ContentResolver cr, String name, int def, int userHandle) {
              String v = getStringForUser(cr, name, userHandle);
              try {
                  return v != null ? Integer.parseInt(v) : def;
              } catch (NumberFormatException e) {
                  return def;
              }
          }
  
          /**
           * Convenience function for retrieving a single system settings value
           * as an integer.  Note that internally setting values are always
           * stored as strings; this function converts the string to an integer
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not an integer.
           *
           * @return The setting's current value.
           */
          public static int getInt(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              return getIntForUser(cr, name, cr.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static int getIntForUser(ContentResolver cr, String name, int userHandle)
                  throws SettingNotFoundException {
              String v = getStringForUser(cr, name, userHandle);
              try {
                  return Integer.parseInt(v);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a single settings value as an
           * integer. This will either create a new entry in the table if the
           * given name does not exist, or modify the value of the existing row
           * with that name.  Note that internally setting values are always
           * stored as strings, so this function converts the given value to a
           * string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putInt(ContentResolver cr, String name, int value) {
              return putIntForUser(cr, name, value, cr.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static boolean putIntForUser(ContentResolver cr, String name, int value,
                  int userHandle) {
              return putStringForUser(cr, name, Integer.toString(value), userHandle);
          }
  
          /**
           * Convenience function for retrieving a single system settings value
           * as a {@code long}.  Note that internally setting values are always
           * stored as strings; this function converts the string to a {@code long}
           * for you.  The default value will be returned if the setting is
           * not defined or not a {@code long}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid {@code long}.
           */
          public static long getLong(ContentResolver cr, String name, long def) {
              return getLongForUser(cr, name, def, cr.getUserId());
          }
  
          /** @hide */
          public static long getLongForUser(ContentResolver cr, String name, long def,
                  int userHandle) {
              String valString = getStringForUser(cr, name, userHandle);
              long value;
              try {
                  value = valString != null ? Long.parseLong(valString) : def;
              } catch (NumberFormatException e) {
                  value = def;
              }
              return value;
          }
  
          /**
           * Convenience function for retrieving a single system settings value
           * as a {@code long}.  Note that internally setting values are always
           * stored as strings; this function converts the string to a {@code long}
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @return The setting's current value.
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not an integer.
           */
          public static long getLong(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              return getLongForUser(cr, name, cr.getUserId());
          }
  
          /** @hide */
          public static long getLongForUser(ContentResolver cr, String name, int userHandle)
                  throws SettingNotFoundException {
              String valString = getStringForUser(cr, name, userHandle);
              try {
                  return Long.parseLong(valString);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a single settings value as a long
           * integer. This will either create a new entry in the table if the
           * given name does not exist, or modify the value of the existing row
           * with that name.  Note that internally setting values are always
           * stored as strings, so this function converts the given value to a
           * string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putLong(ContentResolver cr, String name, long value) {
              return putLongForUser(cr, name, value, cr.getUserId());
          }
  
          /** @hide */
          public static boolean putLongForUser(ContentResolver cr, String name, long value,
                  int userHandle) {
              return putStringForUser(cr, name, Long.toString(value), userHandle);
          }
  
          /**
           * Convenience function for retrieving a single system settings value
           * as a floating point number.  Note that internally setting values are
           * always stored as strings; this function converts the string to an
           * float for you. The default value will be returned if the setting
           * is not defined or not a valid float.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid float.
           */
          public static float getFloat(ContentResolver cr, String name, float def) {
              return getFloatForUser(cr, name, def, cr.getUserId());
          }
  
          /** @hide */
          public static float getFloatForUser(ContentResolver cr, String name, float def,
                  int userHandle) {
              String v = getStringForUser(cr, name, userHandle);
              try {
                  return v != null ? Float.parseFloat(v) : def;
              } catch (NumberFormatException e) {
                  return def;
              }
          }
  
          /**
           * Convenience function for retrieving a single system settings value
           * as a float.  Note that internally setting values are always
           * stored as strings; this function converts the string to a float
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not a float.
           *
           * @return The setting's current value.
           */
          public static float getFloat(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              return getFloatForUser(cr, name, cr.getUserId());
          }
  
          /** @hide */
          public static float getFloatForUser(ContentResolver cr, String name, int userHandle)
                  throws SettingNotFoundException {
              String v = getStringForUser(cr, name, userHandle);
              if (v == null) {
                  throw new SettingNotFoundException(name);
              }
              try {
                  return Float.parseFloat(v);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a single settings value as a
           * floating point number. This will either create a new entry in the
           * table if the given name does not exist, or modify the value of the
           * existing row with that name.  Note that internally setting values
           * are always stored as strings, so this function converts the given
           * value to a string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putFloat(ContentResolver cr, String name, float value) {
              return putFloatForUser(cr, name, value, cr.getUserId());
          }
  
          /** @hide */
          public static boolean putFloatForUser(ContentResolver cr, String name, float value,
                  int userHandle) {
              return putStringForUser(cr, name, Float.toString(value), userHandle);
          }
  
          /**
           * Convenience function to read all of the current
           * configuration-related settings into a
           * {@link Configuration} object.
           *
           * @param cr The ContentResolver to access.
           * @param outConfig Where to place the configuration settings.
           */
          public static void getConfiguration(ContentResolver cr, Configuration outConfig) {
              adjustConfigurationForUser(cr, outConfig, cr.getUserId(),
                      false /* updateSettingsIfEmpty */);
          }
  
          /** @hide */
          public static void adjustConfigurationForUser(ContentResolver cr, Configuration outConfig,
                  int userHandle, boolean updateSettingsIfEmpty) {
              outConfig.fontScale = Settings.System.getFloatForUser(
                      cr, FONT_SCALE, DEFAULT_FONT_SCALE, userHandle);
              if (outConfig.fontScale < 0) {
                  outConfig.fontScale = DEFAULT_FONT_SCALE;
              }
  
              final String localeValue =
                      Settings.System.getStringForUser(cr, SYSTEM_LOCALES, userHandle);
              if (localeValue != null) {
                  outConfig.setLocales(LocaleList.forLanguageTags(localeValue));
              } else {
                  // Do not update configuration with emtpy settings since we need to take over the
                  // locale list of previous user if the settings value is empty. This happens when a
                  // new user is created.
  
                  if (updateSettingsIfEmpty) {
                      // Make current configuration persistent. This is necessary the first time a
                      // user log in. At the first login, the configuration settings are empty, so we
                      // need to store the adjusted configuration as the initial settings.
                      Settings.System.putStringForUser(
                              cr, SYSTEM_LOCALES, outConfig.getLocales().toLanguageTags(),
                              userHandle);
                  }
              }
          }
  
          /**
           * @hide Erase the fields in the Configuration that should be applied
           * by the settings.
           */
          public static void clearConfiguration(Configuration inoutConfig) {
              inoutConfig.fontScale = 0;
              if (!inoutConfig.userSetLocale && !inoutConfig.getLocales().isEmpty()) {
                  inoutConfig.clearLocales();
              }
          }
  
          /**
           * Convenience function to write a batch of configuration-related
           * settings from a {@link Configuration} object.
           *
           * @param cr The ContentResolver to access.
           * @param config The settings to write.
           * @return true if the values were set, false on database errors
           */
          public static boolean putConfiguration(ContentResolver cr, Configuration config) {
              return putConfigurationForUser(cr, config, cr.getUserId());
          }
  
          /** @hide */
          public static boolean putConfigurationForUser(ContentResolver cr, Configuration config,
                  int userHandle) {
              return Settings.System.putFloatForUser(cr, FONT_SCALE, config.fontScale, userHandle) &&
                      Settings.System.putStringForUser(
                              cr, SYSTEM_LOCALES, config.getLocales().toLanguageTags(), userHandle);
          }
  
          /** @hide */
          public static boolean hasInterestingConfigurationChanges(int changes) {
              return (changes & ActivityInfo.CONFIG_FONT_SCALE) != 0 ||
                      (changes & ActivityInfo.CONFIG_LOCALE) != 0;
          }
  
          /** @deprecated - Do not use */
          @Deprecated
          public static boolean getShowGTalkServiceStatus(ContentResolver cr) {
              return getShowGTalkServiceStatusForUser(cr, cr.getUserId());
          }
  
          /**
           * @hide
           * @deprecated - Do not use
           */
          @Deprecated
          public static boolean getShowGTalkServiceStatusForUser(ContentResolver cr,
                  int userHandle) {
              return getIntForUser(cr, SHOW_GTALK_SERVICE_STATUS, 0, userHandle) != 0;
          }
  
          /** @deprecated - Do not use */
          @Deprecated
          public static void setShowGTalkServiceStatus(ContentResolver cr, boolean flag) {
              setShowGTalkServiceStatusForUser(cr, flag, cr.getUserId());
          }
  
          /**
           * @hide
           * @deprecated - Do not use
           */
          @Deprecated
          public static void setShowGTalkServiceStatusForUser(ContentResolver cr, boolean flag,
                  int userHandle) {
              putIntForUser(cr, SHOW_GTALK_SERVICE_STATUS, flag ? 1 : 0, userHandle);
          }
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#STAY_ON_WHILE_PLUGGED_IN} instead
           */
          @Deprecated
          public static final String STAY_ON_WHILE_PLUGGED_IN = Global.STAY_ON_WHILE_PLUGGED_IN;
  
          private static final Validator STAY_ON_WHILE_PLUGGED_IN_VALIDATOR = new Validator() {
              @Override
              public boolean validate(String value) {
                  try {
                      int val = Integer.parseInt(value);
                      return (val == 0)
                              || (val == BatteryManager.BATTERY_PLUGGED_AC)
                              || (val == BatteryManager.BATTERY_PLUGGED_USB)
                              || (val == BatteryManager.BATTERY_PLUGGED_WIRELESS)
                              || (val == (BatteryManager.BATTERY_PLUGGED_AC
                                      | BatteryManager.BATTERY_PLUGGED_USB))
                              || (val == (BatteryManager.BATTERY_PLUGGED_AC
                                      | BatteryManager.BATTERY_PLUGGED_WIRELESS))
                              || (val == (BatteryManager.BATTERY_PLUGGED_USB
                                      | BatteryManager.BATTERY_PLUGGED_WIRELESS))
                              || (val == (BatteryManager.BATTERY_PLUGGED_AC
                                      | BatteryManager.BATTERY_PLUGGED_USB
                                      | BatteryManager.BATTERY_PLUGGED_WIRELESS));
                  } catch (NumberFormatException e) {
                      return false;
                  }
              }
          };
  
          /**
           * What happens when the user presses the end call button if they're not
           * on a call.<br/>
           * <b>Values:</b><br/>
           * 0 - The end button does nothing.<br/>
           * 1 - The end button goes to the home screen.<br/>
           * 2 - The end button puts the device to sleep and locks the keyguard.<br/>
           * 3 - The end button goes to the home screen.  If the user is already on the
           * home screen, it puts the device to sleep.
           */
          public static final String END_BUTTON_BEHAVIOR = "end_button_behavior";
  
          private static final Validator END_BUTTON_BEHAVIOR_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 3);
  
          /**
           * END_BUTTON_BEHAVIOR value for "go home".
           * @hide
           */
          public static final int END_BUTTON_BEHAVIOR_HOME = 0x1;
  
          /**
           * END_BUTTON_BEHAVIOR value for "go to sleep".
           * @hide
           */
          public static final int END_BUTTON_BEHAVIOR_SLEEP = 0x2;
  
          /**
           * END_BUTTON_BEHAVIOR default value.
           * @hide
           */
          public static final int END_BUTTON_BEHAVIOR_DEFAULT = END_BUTTON_BEHAVIOR_SLEEP;
  
          /**
           * Is advanced settings mode turned on. 0 == no, 1 == yes
           * @hide
           */
          public static final String ADVANCED_SETTINGS = "advanced_settings";
  
          private static final Validator ADVANCED_SETTINGS_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * ADVANCED_SETTINGS default value.
           * @hide
           */
          public static final int ADVANCED_SETTINGS_DEFAULT = 0;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#AIRPLANE_MODE_ON} instead
           */
          @Deprecated
          public static final String AIRPLANE_MODE_ON = Global.AIRPLANE_MODE_ON;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#RADIO_BLUETOOTH} instead
           */
          @Deprecated
          public static final String RADIO_BLUETOOTH = Global.RADIO_BLUETOOTH;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#RADIO_WIFI} instead
           */
          @Deprecated
          public static final String RADIO_WIFI = Global.RADIO_WIFI;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#RADIO_WIMAX} instead
           * {@hide}
           */
          @Deprecated
          public static final String RADIO_WIMAX = Global.RADIO_WIMAX;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#RADIO_CELL} instead
           */
          @Deprecated
          public static final String RADIO_CELL = Global.RADIO_CELL;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#RADIO_NFC} instead
           */
          @Deprecated
          public static final String RADIO_NFC = Global.RADIO_NFC;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#AIRPLANE_MODE_RADIOS} instead
           */
          @Deprecated
          public static final String AIRPLANE_MODE_RADIOS = Global.AIRPLANE_MODE_RADIOS;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#AIRPLANE_MODE_TOGGLEABLE_RADIOS} instead
           *
           * {@hide}
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String AIRPLANE_MODE_TOGGLEABLE_RADIOS =
                  Global.AIRPLANE_MODE_TOGGLEABLE_RADIOS;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_SLEEP_POLICY} instead
           */
          @Deprecated
          public static final String WIFI_SLEEP_POLICY = Global.WIFI_SLEEP_POLICY;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_SLEEP_POLICY_DEFAULT} instead
           */
          @Deprecated
          public static final int WIFI_SLEEP_POLICY_DEFAULT = Global.WIFI_SLEEP_POLICY_DEFAULT;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_SLEEP_POLICY_NEVER_WHILE_PLUGGED} instead
           */
          @Deprecated
          public static final int WIFI_SLEEP_POLICY_NEVER_WHILE_PLUGGED =
                  Global.WIFI_SLEEP_POLICY_NEVER_WHILE_PLUGGED;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_SLEEP_POLICY_NEVER} instead
           */
          @Deprecated
          public static final int WIFI_SLEEP_POLICY_NEVER = Global.WIFI_SLEEP_POLICY_NEVER;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#MODE_RINGER} instead
           */
          @Deprecated
          public static final String MODE_RINGER = Global.MODE_RINGER;
  
          /**
           * Whether to use static IP and other static network attributes.
           * <p>
           * Set to 1 for true and 0 for false.
           *
           * @deprecated Use {@link WifiManager} instead
           */
          @Deprecated
          public static final String WIFI_USE_STATIC_IP = "wifi_use_static_ip";
  
          private static final Validator WIFI_USE_STATIC_IP_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * The static IP address.
           * <p>
           * Example: "192.168.1.51"
           *
           * @deprecated Use {@link WifiManager} instead
           */
          @Deprecated
          public static final String WIFI_STATIC_IP = "wifi_static_ip";
  
          private static final Validator WIFI_STATIC_IP_VALIDATOR = LENIENT_IP_ADDRESS_VALIDATOR;
  
          /**
           * If using static IP, the gateway's IP address.
           * <p>
           * Example: "192.168.1.1"
           *
           * @deprecated Use {@link WifiManager} instead
           */
          @Deprecated
          public static final String WIFI_STATIC_GATEWAY = "wifi_static_gateway";
  
          private static final Validator WIFI_STATIC_GATEWAY_VALIDATOR = LENIENT_IP_ADDRESS_VALIDATOR;
  
          /**
           * If using static IP, the net mask.
           * <p>
           * Example: "255.255.255.0"
           *
           * @deprecated Use {@link WifiManager} instead
           */
          @Deprecated
          public static final String WIFI_STATIC_NETMASK = "wifi_static_netmask";
  
          private static final Validator WIFI_STATIC_NETMASK_VALIDATOR = LENIENT_IP_ADDRESS_VALIDATOR;
  
          /**
           * If using static IP, the primary DNS's IP address.
           * <p>
           * Example: "192.168.1.1"
           *
           * @deprecated Use {@link WifiManager} instead
           */
          @Deprecated
          public static final String WIFI_STATIC_DNS1 = "wifi_static_dns1";
  
          private static final Validator WIFI_STATIC_DNS1_VALIDATOR = LENIENT_IP_ADDRESS_VALIDATOR;
  
          /**
           * If using static IP, the secondary DNS's IP address.
           * <p>
           * Example: "192.168.1.2"
           *
           * @deprecated Use {@link WifiManager} instead
           */
          @Deprecated
          public static final String WIFI_STATIC_DNS2 = "wifi_static_dns2";
  
          private static final Validator WIFI_STATIC_DNS2_VALIDATOR = LENIENT_IP_ADDRESS_VALIDATOR;
  
          /**
           * Determines whether remote devices may discover and/or connect to
           * this device.
           * <P>Type: INT</P>
           * 2 -- discoverable and connectable
           * 1 -- connectable but not discoverable
           * 0 -- neither connectable nor discoverable
           */
          public static final String BLUETOOTH_DISCOVERABILITY =
              "bluetooth_discoverability";
  
          private static final Validator BLUETOOTH_DISCOVERABILITY_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 2);
  
          /**
           * Bluetooth discoverability timeout.  If this value is nonzero, then
           * Bluetooth becomes discoverable for a certain number of seconds,
           * after which is becomes simply connectable.  The value is in seconds.
           */
          public static final String BLUETOOTH_DISCOVERABILITY_TIMEOUT =
              "bluetooth_discoverability_timeout";
  
          private static final Validator BLUETOOTH_DISCOVERABILITY_TIMEOUT_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#LOCK_PATTERN_ENABLED}
           * instead
           */
          @Deprecated
          public static final String LOCK_PATTERN_ENABLED = Secure.LOCK_PATTERN_ENABLED;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#LOCK_PATTERN_VISIBLE}
           * instead
           */
          @Deprecated
          public static final String LOCK_PATTERN_VISIBLE = "lock_pattern_visible_pattern";
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Secure#LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED}
           * instead
           */
          @Deprecated
          public static final String LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED =
              "lock_pattern_tactile_feedback_enabled";
  
          /**
           * A formatted string of the next alarm that is set, or the empty string
           * if there is no alarm set.
           *
           * @deprecated Use {@link android.app.AlarmManager#getNextAlarmClock()}.
           */
          @Deprecated
          public static final String NEXT_ALARM_FORMATTED = "next_alarm_formatted";
  
          private static final Validator NEXT_ALARM_FORMATTED_VALIDATOR = new Validator() {
              private static final int MAX_LENGTH = 1000;
  
              @Override
              public boolean validate(String value) {
                  // TODO: No idea what the correct format is.
                  return value == null || value.length() < MAX_LENGTH;
              }
          };
  
          /**
           * Scaling factor for fonts, float.
           */
          public static final String FONT_SCALE = "font_scale";
  
          private static final Validator FONT_SCALE_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  try {
                      return Float.parseFloat(value) >= 0;
                  } catch (NumberFormatException | NullPointerException e) {
                      return false;
                  }
              }
          };
  
          /**
           * The serialized system locale value.
           *
           * Do not use this value directory.
           * To get system locale, use {@link LocaleList#getDefault} instead.
           * To update system locale, use {@link com.android.internal.app.LocalePicker#updateLocales}
           * instead.
           * @hide
           */
          public static final String SYSTEM_LOCALES = "system_locales";
  
  
          /**
           * Name of an application package to be debugged.
           *
           * @deprecated Use {@link Global#DEBUG_APP} instead
           */
          @Deprecated
          public static final String DEBUG_APP = Global.DEBUG_APP;
  
          /**
           * If 1, when launching DEBUG_APP it will wait for the debugger before
           * starting user code.  If 0, it will run normally.
           *
           * @deprecated Use {@link Global#WAIT_FOR_DEBUGGER} instead
           */
          @Deprecated
          public static final String WAIT_FOR_DEBUGGER = Global.WAIT_FOR_DEBUGGER;
  
          /**
           * Whether or not to dim the screen. 0=no  1=yes
           * @deprecated This setting is no longer used.
           */
          @Deprecated
          public static final String DIM_SCREEN = "dim_screen";
  
          private static final Validator DIM_SCREEN_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * The display color mode.
           * @hide
           */
          public static final String DISPLAY_COLOR_MODE = "display_color_mode";
  
          private static final Validator DISPLAY_COLOR_MODE_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  // Assume the actual validation that this device can properly handle this kind of
                  // color mode further down in ColorDisplayManager / ColorDisplayService.
                  try {
                      final int setting = Integer.parseInt(value);
                      final boolean isInFrameworkRange =
                              setting >= ColorDisplayManager.COLOR_MODE_NATURAL
                                      && setting <= ColorDisplayManager.COLOR_MODE_AUTOMATIC;
                      final boolean isInVendorRange =
                              setting >= ColorDisplayManager.VENDOR_COLOR_MODE_RANGE_MIN
                                      && setting <= ColorDisplayManager.VENDOR_COLOR_MODE_RANGE_MAX;
                      return isInFrameworkRange || isInVendorRange;
                  } catch (NumberFormatException | NullPointerException e) {
                      return false;
                  }
              }
          };
  
          /**
           * The user selected min refresh rate in frames per second.
           *
           * If this isn't set, 0 will be used.
           * @hide
           */
          public static final String MIN_REFRESH_RATE = "min_refresh_rate";
  
          /**
           * The user selected peak refresh rate in frames per second.
           *
           * If this isn't set, the system falls back to a device specific default.
           * @hide
           */
          public static final String PEAK_REFRESH_RATE = "peak_refresh_rate";
  
          private static final Validator PEAK_REFRESH_RATE_VALIDATOR =
                  new SettingsValidators.InclusiveFloatRangeValidator(24f, Float.MAX_VALUE);
  
          /**
           * The amount of time in milliseconds before the device goes to sleep or begins
           * to dream after a period of inactivity.  This value is also known as the
           * user activity timeout period since the screen isn't necessarily turned off
           * when it expires.
           *
           * <p>
           * This value is bounded by maximum timeout set by
           * {@link android.app.admin.DevicePolicyManager#setMaximumTimeToLock(ComponentName, long)}.
           */
          public static final String SCREEN_OFF_TIMEOUT = "screen_off_timeout";
  
          private static final Validator SCREEN_OFF_TIMEOUT_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * The screen backlight brightness between 0 and 255.
           */
          public static final String SCREEN_BRIGHTNESS = "screen_brightness";
  
          /**
           * The screen backlight brightness between 0 and 255.
           * @hide
           */
          public static final String SCREEN_BRIGHTNESS_FOR_VR = "screen_brightness_for_vr";
  
          private static final Validator SCREEN_BRIGHTNESS_FOR_VR_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 255);
  
          /**
           * Control whether to enable automatic brightness mode.
           */
          public static final String SCREEN_BRIGHTNESS_MODE = "screen_brightness_mode";
  
          private static final Validator SCREEN_BRIGHTNESS_MODE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Adjustment to auto-brightness to make it generally more (>0.0 <1.0)
           * or less (<0.0 >-1.0) bright.
           * @hide
           */
          @UnsupportedAppUsage
          public static final String SCREEN_AUTO_BRIGHTNESS_ADJ = "screen_auto_brightness_adj";
  
          private static final Validator SCREEN_AUTO_BRIGHTNESS_ADJ_VALIDATOR =
                  new SettingsValidators.InclusiveFloatRangeValidator(-1, 1);
  
          /**
           * SCREEN_BRIGHTNESS_MODE value for manual mode.
           */
          public static final int SCREEN_BRIGHTNESS_MODE_MANUAL = 0;
  
          /**
           * SCREEN_BRIGHTNESS_MODE value for automatic mode.
           */
          public static final int SCREEN_BRIGHTNESS_MODE_AUTOMATIC = 1;
  
          /**
           * Control whether to enable adaptive sleep mode.
           * @hide
           */
          public static final String ADAPTIVE_SLEEP = "adaptive_sleep";
  
          private static final Validator ADAPTIVE_SLEEP_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Control whether the process CPU usage meter should be shown.
           *
           * @deprecated This functionality is no longer available as of
           * {@link android.os.Build.VERSION_CODES#N_MR1}.
           */
          @Deprecated
          public static final String SHOW_PROCESSES = Global.SHOW_PROCESSES;
  
          /**
           * If 1, the activity manager will aggressively finish activities and
           * processes as soon as they are no longer needed.  If 0, the normal
           * extended lifetime is used.
           *
           * @deprecated Use {@link Global#ALWAYS_FINISH_ACTIVITIES} instead
           */
          @Deprecated
          public static final String ALWAYS_FINISH_ACTIVITIES = Global.ALWAYS_FINISH_ACTIVITIES;
  
          /**
           * Determines which streams are affected by ringer and zen mode changes. The
           * stream type's bit should be set to 1 if it should be muted when going
           * into an inaudible ringer mode.
           */
          public static final String MODE_RINGER_STREAMS_AFFECTED = "mode_ringer_streams_affected";
  
          private static final Validator MODE_RINGER_STREAMS_AFFECTED_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
            * Determines which streams are affected by mute. The
            * stream type's bit should be set to 1 if it should be muted when a mute request
            * is received.
            */
          public static final String MUTE_STREAMS_AFFECTED = "mute_streams_affected";
  
          private static final Validator MUTE_STREAMS_AFFECTED_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Whether vibrate is on for different events. This is used internally,
           * changing this value will not change the vibrate. See AudioManager.
           */
          public static final String VIBRATE_ON = "vibrate_on";
  
          private static final Validator VIBRATE_ON_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * If 1, redirects the system vibrator to all currently attached input devices
           * that support vibration.  If there are no such input devices, then the system
           * vibrator is used instead.
           * If 0, does not register the system vibrator.
           *
           * This setting is mainly intended to provide a compatibility mechanism for
           * applications that only know about the system vibrator and do not use the
           * input device vibrator API.
           *
           * @hide
           */
          public static final String VIBRATE_INPUT_DEVICES = "vibrate_input_devices";
  
          private static final Validator VIBRATE_INPUT_DEVICES_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * The intensity of notification vibrations, if configurable.
           *
           * Not all devices are capable of changing their vibration intensity; on these devices
           * there will likely be no difference between the various vibration intensities except for
           * intensity 0 (off) and the rest.
           *
           * <b>Values:</b><br/>
           * 0 - Vibration is disabled<br/>
           * 1 - Weak vibrations<br/>
           * 2 - Medium vibrations<br/>
           * 3 - Strong vibrations
           * @hide
           */
          public static final String NOTIFICATION_VIBRATION_INTENSITY =
                  "notification_vibration_intensity";
          /**
           * The intensity of ringtone vibrations, if configurable.
           *
           * Not all devices are capable of changing their vibration intensity; on these devices
           * there will likely be no difference between the various vibration intensities except for
           * intensity 0 (off) and the rest.
           *
           * <b>Values:</b><br/>
           * 0 - Vibration is disabled<br/>
           * 1 - Weak vibrations<br/>
           * 2 - Medium vibrations<br/>
           * 3 - Strong vibrations
           * @hide
           */
          public static final String RING_VIBRATION_INTENSITY =
                  "ring_vibration_intensity";
  
          /**
           * The intensity of haptic feedback vibrations, if configurable.
           *
           * Not all devices are capable of changing their feedback intensity; on these devices
           * there will likely be no difference between the various vibration intensities except for
           * intensity 0 (off) and the rest.
           *
           * <b>Values:</b><br/>
           * 0 - Vibration is disabled<br/>
           * 1 - Weak vibrations<br/>
           * 2 - Medium vibrations<br/>
           * 3 - Strong vibrations
           * @hide
           */
          public static final String HAPTIC_FEEDBACK_INTENSITY =
                  "haptic_feedback_intensity";
  
          private static final Validator VIBRATION_INTENSITY_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 3);
  
          /**
           * Ringer volume. This is used internally, changing this value will not
           * change the volume. See AudioManager.
           *
           * @removed Not used by anything since API 2.
           */
          public static final String VOLUME_RING = "volume_ring";
  
          /**
           * System/notifications volume. This is used internally, changing this
           * value will not change the volume. See AudioManager.
           *
           * @removed Not used by anything since API 2.
           */
          public static final String VOLUME_SYSTEM = "volume_system";
  
          /**
           * Voice call volume. This is used internally, changing this value will
           * not change the volume. See AudioManager.
           *
           * @removed Not used by anything since API 2.
           */
          public static final String VOLUME_VOICE = "volume_voice";
  
          /**
           * Music/media/gaming volume. This is used internally, changing this
           * value will not change the volume. See AudioManager.
           *
           * @removed Not used by anything since API 2.
           */
          public static final String VOLUME_MUSIC = "volume_music";
  
          /**
           * Alarm volume. This is used internally, changing this
           * value will not change the volume. See AudioManager.
           *
           * @removed Not used by anything since API 2.
           */
          public static final String VOLUME_ALARM = "volume_alarm";
  
          /**
           * Notification volume. This is used internally, changing this
           * value will not change the volume. See AudioManager.
           *
           * @removed Not used by anything since API 2.
           */
          public static final String VOLUME_NOTIFICATION = "volume_notification";
  
          /**
           * Bluetooth Headset volume. This is used internally, changing this value will
           * not change the volume. See AudioManager.
           *
           * @removed Not used by anything since API 2.
           */
          public static final String VOLUME_BLUETOOTH_SCO = "volume_bluetooth_sco";
  
          /**
           * @hide
           * Acessibility volume. This is used internally, changing this
           * value will not change the volume.
           */
          public static final String VOLUME_ACCESSIBILITY = "volume_a11y";
  
          /**
           * Master volume (float in the range 0.0f to 1.0f).
           *
           * @hide
           */
          public static final String VOLUME_MASTER = "volume_master";
  
          /**
           * Master mono (int 1 = mono, 0 = normal).
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String MASTER_MONO = "master_mono";
  
          private static final Validator MASTER_MONO_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Master balance (float -1.f = 100% left, 0.f = dead center, 1.f = 100% right).
           *
           * @hide
           */
          public static final String MASTER_BALANCE = "master_balance";
  
          private static final Validator MASTER_BALANCE_VALIDATOR =
                  new SettingsValidators.InclusiveFloatRangeValidator(-1.f, 1.f);
  
          /**
           * Whether the notifications should use the ring volume (value of 1) or
           * a separate notification volume (value of 0). In most cases, users
           * will have this enabled so the notification and ringer volumes will be
           * the same. However, power users can disable this and use the separate
           * notification volume control.
           * <p>
           * Note: This is a one-off setting that will be removed in the future
           * when there is profile support. For this reason, it is kept hidden
           * from the public APIs.
           *
           * @hide
           * @deprecated
           */
          @Deprecated
          public static final String NOTIFICATIONS_USE_RING_VOLUME =
              "notifications_use_ring_volume";
  
          private static final Validator NOTIFICATIONS_USE_RING_VOLUME_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether silent mode should allow vibration feedback. This is used
           * internally in AudioService and the Sound settings activity to
           * coordinate decoupling of vibrate and silent modes. This setting
           * will likely be removed in a future release with support for
           * audio/vibe feedback profiles.
           *
           * Not used anymore. On devices with vibrator, the user explicitly selects
           * silent or vibrate mode.
           * Kept for use by legacy database upgrade code in DatabaseHelper.
           * @hide
           */
          @UnsupportedAppUsage
          public static final String VIBRATE_IN_SILENT = "vibrate_in_silent";
  
          private static final Validator VIBRATE_IN_SILENT_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * The mapping of stream type (integer) to its setting.
           *
           * @removed  Not used by anything since API 2.
           */
          public static final String[] VOLUME_SETTINGS = {
              VOLUME_VOICE, VOLUME_SYSTEM, VOLUME_RING, VOLUME_MUSIC,
              VOLUME_ALARM, VOLUME_NOTIFICATION, VOLUME_BLUETOOTH_SCO
          };
  
          /**
           * @hide
           * The mapping of stream type (integer) to its setting.
           * Unlike the VOLUME_SETTINGS array, this one contains as many entries as
           * AudioSystem.NUM_STREAM_TYPES, and has empty strings for stream types whose volumes
           * are never persisted.
           */
          public static final String[] VOLUME_SETTINGS_INT = {
                  VOLUME_VOICE, VOLUME_SYSTEM, VOLUME_RING, VOLUME_MUSIC,
                  VOLUME_ALARM, VOLUME_NOTIFICATION, VOLUME_BLUETOOTH_SCO,
                  "" /*STREAM_SYSTEM_ENFORCED, no setting for this stream*/,
                  "" /*STREAM_DTMF, no setting for this stream*/,
                  "" /*STREAM_TTS, no setting for this stream*/,
                  VOLUME_ACCESSIBILITY
              };
  
          /**
           * Appended to various volume related settings to record the previous
           * values before they the settings were affected by a silent/vibrate
           * ringer mode change.
           *
           * @removed  Not used by anything since API 2.
           */
          public static final String APPEND_FOR_LAST_AUDIBLE = "_last_audible";
  
          /**
           * Persistent store for the system-wide default ringtone URI.
           * <p>
           * If you need to play the default ringtone at any given time, it is recommended
           * you give {@link #DEFAULT_RINGTONE_URI} to the media player.  It will resolve
           * to the set default ringtone at the time of playing.
           *
           * @see #DEFAULT_RINGTONE_URI
           */
          public static final String RINGTONE = "ringtone";
  
          private static final Validator RINGTONE_VALIDATOR = URI_VALIDATOR;
  
          /**
           * A {@link Uri} that will point to the current default ringtone at any
           * given time.
           * <p>
           * If the current default ringtone is in the DRM provider and the caller
           * does not have permission, the exception will be a
           * FileNotFoundException.
           */
          public static final Uri DEFAULT_RINGTONE_URI = getUriFor(RINGTONE);
  
          /** {@hide} */
          public static final String RINGTONE_CACHE = "ringtone_cache";
          /** {@hide} */
          public static final Uri RINGTONE_CACHE_URI = getUriFor(RINGTONE_CACHE);
  
          /**
           * Persistent store for the system-wide default notification sound.
           *
           * @see #RINGTONE
           * @see #DEFAULT_NOTIFICATION_URI
           */
          public static final String NOTIFICATION_SOUND = "notification_sound";
  
          private static final Validator NOTIFICATION_SOUND_VALIDATOR = URI_VALIDATOR;
  
          /**
           * A {@link Uri} that will point to the current default notification
           * sound at any given time.
           *
           * @see #DEFAULT_RINGTONE_URI
           */
          public static final Uri DEFAULT_NOTIFICATION_URI = getUriFor(NOTIFICATION_SOUND);
  
          /** {@hide} */
          public static final String NOTIFICATION_SOUND_CACHE = "notification_sound_cache";
          /** {@hide} */
          public static final Uri NOTIFICATION_SOUND_CACHE_URI = getUriFor(NOTIFICATION_SOUND_CACHE);
  
          /**
           * Persistent store for the system-wide default alarm alert.
           *
           * @see #RINGTONE
           * @see #DEFAULT_ALARM_ALERT_URI
           */
          public static final String ALARM_ALERT = "alarm_alert";
  
          private static final Validator ALARM_ALERT_VALIDATOR = URI_VALIDATOR;
  
          /**
           * A {@link Uri} that will point to the current default alarm alert at
           * any given time.
           *
           * @see #DEFAULT_ALARM_ALERT_URI
           */
          public static final Uri DEFAULT_ALARM_ALERT_URI = getUriFor(ALARM_ALERT);
  
          /** {@hide} */
          public static final String ALARM_ALERT_CACHE = "alarm_alert_cache";
          /** {@hide} */
          public static final Uri ALARM_ALERT_CACHE_URI = getUriFor(ALARM_ALERT_CACHE);
  
          /**
           * Persistent store for the system default media button event receiver.
           *
           * @hide
           */
          public static final String MEDIA_BUTTON_RECEIVER = "media_button_receiver";
  
          private static final Validator MEDIA_BUTTON_RECEIVER_VALIDATOR = COMPONENT_NAME_VALIDATOR;
  
          /**
           * Setting to enable Auto Replace (AutoText) in text editors. 1 = On, 0 = Off
           */
          public static final String TEXT_AUTO_REPLACE = "auto_replace";
  
          private static final Validator TEXT_AUTO_REPLACE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Setting to enable Auto Caps in text editors. 1 = On, 0 = Off
           */
          public static final String TEXT_AUTO_CAPS = "auto_caps";
  
          private static final Validator TEXT_AUTO_CAPS_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Setting to enable Auto Punctuate in text editors. 1 = On, 0 = Off. This
           * feature converts two spaces to a "." and space.
           */
          public static final String TEXT_AUTO_PUNCTUATE = "auto_punctuate";
  
          private static final Validator TEXT_AUTO_PUNCTUATE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Setting to showing password characters in text editors. 1 = On, 0 = Off
           */
          public static final String TEXT_SHOW_PASSWORD = "show_password";
  
          private static final Validator TEXT_SHOW_PASSWORD_VALIDATOR = BOOLEAN_VALIDATOR;
  
          public static final String SHOW_GTALK_SERVICE_STATUS =
                  "SHOW_GTALK_SERVICE_STATUS";
  
          private static final Validator SHOW_GTALK_SERVICE_STATUS_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Name of activity to use for wallpaper on the home screen.
           *
           * @deprecated Use {@link WallpaperManager} instead.
           */
          @Deprecated
          public static final String WALLPAPER_ACTIVITY = "wallpaper_activity";
  
          private static final Validator WALLPAPER_ACTIVITY_VALIDATOR = new Validator() {
              private static final int MAX_LENGTH = 1000;
  
              @Override
              public boolean validate(String value) {
                  if (value != null && value.length() > MAX_LENGTH) {
                      return false;
                  }
                  return ComponentName.unflattenFromString(value) != null;
              }
          };
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#AUTO_TIME}
           * instead
           */
          @Deprecated
          public static final String AUTO_TIME = Global.AUTO_TIME;
  
          private static final Validator AUTO_TIME_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#AUTO_TIME_ZONE}
           * instead
           */
          @Deprecated
          public static final String AUTO_TIME_ZONE = Global.AUTO_TIME_ZONE;
  
          private static final Validator AUTO_TIME_ZONE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Display times as 12 or 24 hours
           *   12
           *   24
           */
          public static final String TIME_12_24 = "time_12_24";
  
          /** @hide */
          public static final Validator TIME_12_24_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[] {"12", "24", null});
  
          /**
           * Date format string
           *   mm/dd/yyyy
           *   dd/mm/yyyy
           *   yyyy/mm/dd
           */
          public static final String DATE_FORMAT = "date_format";
  
          /** @hide */
          public static final Validator DATE_FORMAT_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  try {
                      new SimpleDateFormat(value);
                      return true;
                  } catch (IllegalArgumentException | NullPointerException e) {
                      return false;
                  }
              }
          };
  
          /**
           * Whether the setup wizard has been run before (on first boot), or if
           * it still needs to be run.
           *
           * nonzero = it has been run in the past
           * 0 = it has not been run in the past
           */
          public static final String SETUP_WIZARD_HAS_RUN = "setup_wizard_has_run";
  
          /** @hide */
          public static final Validator SETUP_WIZARD_HAS_RUN_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Scaling factor for normal window animations. Setting to 0 will disable window
           * animations.
           *
           * @deprecated Use {@link Global#WINDOW_ANIMATION_SCALE} instead
           */
          @Deprecated
          public static final String WINDOW_ANIMATION_SCALE = Global.WINDOW_ANIMATION_SCALE;
  
          /**
           * Scaling factor for activity transition animations. Setting to 0 will disable window
           * animations.
           *
           * @deprecated Use {@link Global#TRANSITION_ANIMATION_SCALE} instead
           */
          @Deprecated
          public static final String TRANSITION_ANIMATION_SCALE = Global.TRANSITION_ANIMATION_SCALE;
  
          /**
           * Scaling factor for Animator-based animations. This affects both the start delay and
           * duration of all such animations. Setting to 0 will cause animations to end immediately.
           * The default value is 1.
           *
           * @deprecated Use {@link Global#ANIMATOR_DURATION_SCALE} instead
           */
          @Deprecated
          public static final String ANIMATOR_DURATION_SCALE = Global.ANIMATOR_DURATION_SCALE;
  
          /**
           * Control whether the accelerometer will be used to change screen
           * orientation.  If 0, it will not be used unless explicitly requested
           * by the application; if 1, it will be used by default unless explicitly
           * disabled by the application.
           */
          public static final String ACCELEROMETER_ROTATION = "accelerometer_rotation";
  
          /** @hide */
          public static final Validator ACCELEROMETER_ROTATION_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Default screen rotation when no other policy applies.
           * When {@link #ACCELEROMETER_ROTATION} is zero and no on-screen Activity expresses a
           * preference, this rotation value will be used. Must be one of the
           * {@link android.view.Surface#ROTATION_0 Surface rotation constants}.
           *
           * @see Display#getRotation
           */
          public static final String USER_ROTATION = "user_rotation";
  
          /** @hide */
          public static final Validator USER_ROTATION_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 3);
  
          /**
           * Control whether the rotation lock toggle in the System UI should be hidden.
           * Typically this is done for accessibility purposes to make it harder for
           * the user to accidentally toggle the rotation lock while the display rotation
           * has been locked for accessibility.
           *
           * If 0, then rotation lock toggle is not hidden for accessibility (although it may be
           * unavailable for other reasons).  If 1, then the rotation lock toggle is hidden.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String HIDE_ROTATION_LOCK_TOGGLE_FOR_ACCESSIBILITY =
                  "hide_rotation_lock_toggle_for_accessibility";
  
          /** @hide */
          public static final Validator HIDE_ROTATION_LOCK_TOGGLE_FOR_ACCESSIBILITY_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether the phone vibrates when it is ringing due to an incoming call. This will
           * be used by Phone and Setting apps; it shouldn't affect other apps.
           * The value is boolean (1 or 0).
           *
           * Note: this is not same as "vibrate on ring", which had been available until ICS.
           * It was about AudioManager's setting and thus affected all the applications which
           * relied on the setting, while this is purely about the vibration setting for incoming
           * calls.
           */
          public static final String VIBRATE_WHEN_RINGING = "vibrate_when_ringing";
  
          /** @hide */
          public static final Validator VIBRATE_WHEN_RINGING_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * When {@code 1}, Telecom enhanced call blocking functionality is enabled.  When
           * {@code 0}, enhanced call blocking functionality is disabled.
           * @hide
           */
          public static final String DEBUG_ENABLE_ENHANCED_CALL_BLOCKING =
                  "debug.enable_enhanced_calling";
  
          /**
           * Whether the audible DTMF tones are played by the dialer when dialing. The value is
           * boolean (1 or 0).
           */
          public static final String DTMF_TONE_WHEN_DIALING = "dtmf_tone";
  
          /** @hide */
          public static final Validator DTMF_TONE_WHEN_DIALING_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * CDMA only settings
           * DTMF tone type played by the dialer when dialing.
           *                 0 = Normal
           *                 1 = Long
           */
          public static final String DTMF_TONE_TYPE_WHEN_DIALING = "dtmf_tone_type";
  
          /** @hide */
          public static final Validator DTMF_TONE_TYPE_WHEN_DIALING_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the hearing aid is enabled. The value is
           * boolean (1 or 0).
           * @hide
           */
          @UnsupportedAppUsage
          public static final String HEARING_AID = "hearing_aid";
  
          /** @hide */
          public static final Validator HEARING_AID_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * CDMA only settings
           * TTY Mode
           * 0 = OFF
           * 1 = FULL
           * 2 = VCO
           * 3 = HCO
           * @hide
           */
          @UnsupportedAppUsage
          public static final String TTY_MODE = "tty_mode";
  
          /** @hide */
          public static final Validator TTY_MODE_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 3);
  
          /**
           * Whether the sounds effects (key clicks, lid open ...) are enabled. The value is
           * boolean (1 or 0).
           */
          public static final String SOUND_EFFECTS_ENABLED = "sound_effects_enabled";
  
          /** @hide */
          public static final Validator SOUND_EFFECTS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether haptic feedback (Vibrate on tap) is enabled. The value is
           * boolean (1 or 0).
           */
          public static final String HAPTIC_FEEDBACK_ENABLED = "haptic_feedback_enabled";
  
          /** @hide */
          public static final Validator HAPTIC_FEEDBACK_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Each application that shows web suggestions should have its own
           * setting for this.
           */
          @Deprecated
          public static final String SHOW_WEB_SUGGESTIONS = "show_web_suggestions";
  
          /** @hide */
          public static final Validator SHOW_WEB_SUGGESTIONS_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the notification LED should repeatedly flash when a notification is
           * pending. The value is boolean (1 or 0).
           * @hide
           */
          @UnsupportedAppUsage
          public static final String NOTIFICATION_LIGHT_PULSE = "notification_light_pulse";
  
          /** @hide */
          public static final Validator NOTIFICATION_LIGHT_PULSE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Show pointer location on screen?
           * 0 = no
           * 1 = yes
           * @hide
           */
          @UnsupportedAppUsage
          public static final String POINTER_LOCATION = "pointer_location";
  
          /** @hide */
          public static final Validator POINTER_LOCATION_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Show touch positions on screen?
           * 0 = no
           * 1 = yes
           * @hide
           */
          @UnsupportedAppUsage
          public static final String SHOW_TOUCHES = "show_touches";
  
          /** @hide */
          public static final Validator SHOW_TOUCHES_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Log raw orientation data from
           * {@link com.android.server.policy.WindowOrientationListener} for use with the
           * orientationplot.py tool.
           * 0 = no
           * 1 = yes
           * @hide
           */
          public static final String WINDOW_ORIENTATION_LISTENER_LOG =
                  "window_orientation_listener_log";
  
          /** @hide */
          public static final Validator WINDOW_ORIENTATION_LISTENER_LOG_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#POWER_SOUNDS_ENABLED}
           * instead
           * @hide
           */
          @Deprecated
          public static final String POWER_SOUNDS_ENABLED = Global.POWER_SOUNDS_ENABLED;
  
          private static final Validator POWER_SOUNDS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#DOCK_SOUNDS_ENABLED}
           * instead
           * @hide
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String DOCK_SOUNDS_ENABLED = Global.DOCK_SOUNDS_ENABLED;
  
          private static final Validator DOCK_SOUNDS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether to play sounds when the keyguard is shown and dismissed.
           * @hide
           */
          @UnsupportedAppUsage
          public static final String LOCKSCREEN_SOUNDS_ENABLED = "lockscreen_sounds_enabled";
  
          /** @hide */
          public static final Validator LOCKSCREEN_SOUNDS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the lockscreen should be completely disabled.
           * @hide
           */
          public static final String LOCKSCREEN_DISABLED = "lockscreen.disabled";
  
          /** @hide */
          public static final Validator LOCKSCREEN_DISABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#LOW_BATTERY_SOUND}
           * instead
           * @hide
           */
          @Deprecated
          public static final String LOW_BATTERY_SOUND = Global.LOW_BATTERY_SOUND;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#DESK_DOCK_SOUND}
           * instead
           * @hide
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String DESK_DOCK_SOUND = Global.DESK_DOCK_SOUND;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#DESK_UNDOCK_SOUND}
           * instead
           * @hide
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String DESK_UNDOCK_SOUND = Global.DESK_UNDOCK_SOUND;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#CAR_DOCK_SOUND}
           * instead
           * @hide
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String CAR_DOCK_SOUND = Global.CAR_DOCK_SOUND;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#CAR_UNDOCK_SOUND}
           * instead
           * @hide
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String CAR_UNDOCK_SOUND = Global.CAR_UNDOCK_SOUND;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#LOCK_SOUND}
           * instead
           * @hide
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String LOCK_SOUND = Global.LOCK_SOUND;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#UNLOCK_SOUND}
           * instead
           * @hide
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String UNLOCK_SOUND = Global.UNLOCK_SOUND;
  
          /**
           * Receive incoming SIP calls?
           * 0 = no
           * 1 = yes
           * @hide
           */
          public static final String SIP_RECEIVE_CALLS = "sip_receive_calls";
  
          /** @hide */
          public static final Validator SIP_RECEIVE_CALLS_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Call Preference String.
           * "SIP_ALWAYS" : Always use SIP with network access
           * "SIP_ADDRESS_ONLY" : Only if destination is a SIP address
           * @hide
           */
          public static final String SIP_CALL_OPTIONS = "sip_call_options";
  
          /** @hide */
          public static final Validator SIP_CALL_OPTIONS_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(
                          new String[] {"SIP_ALWAYS", "SIP_ADDRESS_ONLY"});
  
          /**
           * One of the sip call options: Always use SIP with network access.
           * @hide
           */
          public static final String SIP_ALWAYS = "SIP_ALWAYS";
  
          /** @hide */
          public static final Validator SIP_ALWAYS_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * One of the sip call options: Only if destination is a SIP address.
           * @hide
           */
          public static final String SIP_ADDRESS_ONLY = "SIP_ADDRESS_ONLY";
  
          /** @hide */
          public static final Validator SIP_ADDRESS_ONLY_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use SIP_ALWAYS or SIP_ADDRESS_ONLY instead.  Formerly used to indicate that
           * the user should be prompted each time a call is made whether it should be placed using
           * SIP.  The {@link com.android.providers.settings.DatabaseHelper} replaces this with
           * SIP_ADDRESS_ONLY.
           * @hide
           */
          @Deprecated
          public static final String SIP_ASK_ME_EACH_TIME = "SIP_ASK_ME_EACH_TIME";
  
          /** @hide */
          public static final Validator SIP_ASK_ME_EACH_TIME_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Pointer speed setting.
           * This is an integer value in a range between -7 and +7, so there are 15 possible values.
           *   -7 = slowest
           *    0 = default speed
           *   +7 = fastest
           * @hide
           */
          @UnsupportedAppUsage
          public static final String POINTER_SPEED = "pointer_speed";
  
          /** @hide */
          public static final Validator POINTER_SPEED_VALIDATOR =
                  new SettingsValidators.InclusiveFloatRangeValidator(-7, 7);
  
          /**
           * Whether lock-to-app will be triggered by long-press on recents.
           * @hide
           */
          public static final String LOCK_TO_APP_ENABLED = "lock_to_app_enabled";
  
          /** @hide */
          public static final Validator LOCK_TO_APP_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * I am the lolrus.
           * <p>
           * Nonzero values indicate that the user has a bukkit.
           * Backward-compatible with <code>PrefGetPreference(prefAllowEasterEggs)</code>.
           * @hide
           */
          public static final String EGG_MODE = "egg_mode";
  
          /** @hide */
          public static final Validator EGG_MODE_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  try {
                      return Long.parseLong(value) >= 0;
                  } catch (NumberFormatException e) {
                      return false;
                  }
              }
          };
  
          /**
           * Setting to determine whether or not to show the battery percentage in the status bar.
           *    0 - Don't show percentage
           *    1 - Show percentage
           * @hide
           */
          public static final String SHOW_BATTERY_PERCENT = "status_bar_show_battery_percent";
  
          /** @hide */
          private static final Validator SHOW_BATTERY_PERCENT_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * IMPORTANT: If you add a new public settings you also have to add it to
           * PUBLIC_SETTINGS below. If the new setting is hidden you have to add
           * it to PRIVATE_SETTINGS below. Also add a validator that can validate
           * the setting value. See an example above.
           */
  
          /**
           * Settings to backup. This is here so that it's in the same place as the settings
           * keys and easy to update.
           *
           * NOTE: Settings are backed up and restored in the order they appear
           *       in this array. If you have one setting depending on another,
           *       make sure that they are ordered appropriately.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String[] SETTINGS_TO_BACKUP = {
              STAY_ON_WHILE_PLUGGED_IN,   // moved to global
              WIFI_USE_STATIC_IP,
              WIFI_STATIC_IP,
              WIFI_STATIC_GATEWAY,
              WIFI_STATIC_NETMASK,
              WIFI_STATIC_DNS1,
              WIFI_STATIC_DNS2,
              BLUETOOTH_DISCOVERABILITY,
              BLUETOOTH_DISCOVERABILITY_TIMEOUT,
              FONT_SCALE,
              DIM_SCREEN,
              SCREEN_OFF_TIMEOUT,
              SCREEN_BRIGHTNESS_MODE,
              SCREEN_AUTO_BRIGHTNESS_ADJ,
              SCREEN_BRIGHTNESS_FOR_VR,
              ADAPTIVE_SLEEP,
              VIBRATE_INPUT_DEVICES,
              MODE_RINGER_STREAMS_AFFECTED,
              TEXT_AUTO_REPLACE,
              TEXT_AUTO_CAPS,
              TEXT_AUTO_PUNCTUATE,
              TEXT_SHOW_PASSWORD,
              AUTO_TIME,                  // moved to global
              AUTO_TIME_ZONE,             // moved to global
              TIME_12_24,
              DATE_FORMAT,
              DTMF_TONE_WHEN_DIALING,
              DTMF_TONE_TYPE_WHEN_DIALING,
              HEARING_AID,
              TTY_MODE,
              MASTER_MONO,
              MASTER_BALANCE,
              SOUND_EFFECTS_ENABLED,
              HAPTIC_FEEDBACK_ENABLED,
              POWER_SOUNDS_ENABLED,       // moved to global
              DOCK_SOUNDS_ENABLED,        // moved to global
              LOCKSCREEN_SOUNDS_ENABLED,
              SHOW_WEB_SUGGESTIONS,
              SIP_CALL_OPTIONS,
              SIP_RECEIVE_CALLS,
              POINTER_SPEED,
              VIBRATE_WHEN_RINGING,
              RINGTONE,
              LOCK_TO_APP_ENABLED,
              NOTIFICATION_SOUND,
              ACCELEROMETER_ROTATION,
              SHOW_BATTERY_PERCENT,
              NOTIFICATION_VIBRATION_INTENSITY,
              RING_VIBRATION_INTENSITY,
              HAPTIC_FEEDBACK_INTENSITY,
              DISPLAY_COLOR_MODE,
              ALARM_ALERT,
              NOTIFICATION_LIGHT_PULSE,
          };
  
          /**
           * Keys we no longer back up under the current schema, but want to continue to
           * process when restoring historical backup datasets.
           *
           * All settings in {@link LEGACY_RESTORE_SETTINGS} array *must* have a non-null validator,
           * otherwise they won't be restored.
           *
           * @hide
           */
          public static final String[] LEGACY_RESTORE_SETTINGS = {
          };
  
          /**
           * These are all public system settings
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final Set<String> PUBLIC_SETTINGS = new ArraySet<>();
          static {
              PUBLIC_SETTINGS.add(END_BUTTON_BEHAVIOR);
              PUBLIC_SETTINGS.add(WIFI_USE_STATIC_IP);
              PUBLIC_SETTINGS.add(WIFI_STATIC_IP);
              PUBLIC_SETTINGS.add(WIFI_STATIC_GATEWAY);
              PUBLIC_SETTINGS.add(WIFI_STATIC_NETMASK);
              PUBLIC_SETTINGS.add(WIFI_STATIC_DNS1);
              PUBLIC_SETTINGS.add(WIFI_STATIC_DNS2);
              PUBLIC_SETTINGS.add(BLUETOOTH_DISCOVERABILITY);
              PUBLIC_SETTINGS.add(BLUETOOTH_DISCOVERABILITY_TIMEOUT);
              PUBLIC_SETTINGS.add(NEXT_ALARM_FORMATTED);
              PUBLIC_SETTINGS.add(FONT_SCALE);
              PUBLIC_SETTINGS.add(SYSTEM_LOCALES);
              PUBLIC_SETTINGS.add(DIM_SCREEN);
              PUBLIC_SETTINGS.add(SCREEN_OFF_TIMEOUT);
              PUBLIC_SETTINGS.add(SCREEN_BRIGHTNESS);
              PUBLIC_SETTINGS.add(SCREEN_BRIGHTNESS_FOR_VR);
              PUBLIC_SETTINGS.add(SCREEN_BRIGHTNESS_MODE);
              PUBLIC_SETTINGS.add(ADAPTIVE_SLEEP);
              PUBLIC_SETTINGS.add(MODE_RINGER_STREAMS_AFFECTED);
              PUBLIC_SETTINGS.add(MUTE_STREAMS_AFFECTED);
              PUBLIC_SETTINGS.add(VIBRATE_ON);
              PUBLIC_SETTINGS.add(VOLUME_RING);
              PUBLIC_SETTINGS.add(VOLUME_SYSTEM);
              PUBLIC_SETTINGS.add(VOLUME_VOICE);
              PUBLIC_SETTINGS.add(VOLUME_MUSIC);
              PUBLIC_SETTINGS.add(VOLUME_ALARM);
              PUBLIC_SETTINGS.add(VOLUME_NOTIFICATION);
              PUBLIC_SETTINGS.add(VOLUME_BLUETOOTH_SCO);
              PUBLIC_SETTINGS.add(RINGTONE);
              PUBLIC_SETTINGS.add(NOTIFICATION_SOUND);
              PUBLIC_SETTINGS.add(ALARM_ALERT);
              PUBLIC_SETTINGS.add(TEXT_AUTO_REPLACE);
              PUBLIC_SETTINGS.add(TEXT_AUTO_CAPS);
              PUBLIC_SETTINGS.add(TEXT_AUTO_PUNCTUATE);
              PUBLIC_SETTINGS.add(TEXT_SHOW_PASSWORD);
              PUBLIC_SETTINGS.add(SHOW_GTALK_SERVICE_STATUS);
              PUBLIC_SETTINGS.add(WALLPAPER_ACTIVITY);
              PUBLIC_SETTINGS.add(TIME_12_24);
              PUBLIC_SETTINGS.add(DATE_FORMAT);
              PUBLIC_SETTINGS.add(SETUP_WIZARD_HAS_RUN);
              PUBLIC_SETTINGS.add(ACCELEROMETER_ROTATION);
              PUBLIC_SETTINGS.add(USER_ROTATION);
              PUBLIC_SETTINGS.add(DTMF_TONE_WHEN_DIALING);
              PUBLIC_SETTINGS.add(SOUND_EFFECTS_ENABLED);
              PUBLIC_SETTINGS.add(HAPTIC_FEEDBACK_ENABLED);
              PUBLIC_SETTINGS.add(SHOW_WEB_SUGGESTIONS);
              PUBLIC_SETTINGS.add(VIBRATE_WHEN_RINGING);
          }
  
          /**
           * These are all hidden system settings.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final Set<String> PRIVATE_SETTINGS = new ArraySet<>();
          static {
              PRIVATE_SETTINGS.add(WIFI_USE_STATIC_IP);
              PRIVATE_SETTINGS.add(END_BUTTON_BEHAVIOR);
              PRIVATE_SETTINGS.add(ADVANCED_SETTINGS);
              PRIVATE_SETTINGS.add(SCREEN_AUTO_BRIGHTNESS_ADJ);
              PRIVATE_SETTINGS.add(VIBRATE_INPUT_DEVICES);
              PRIVATE_SETTINGS.add(VOLUME_MASTER);
              PRIVATE_SETTINGS.add(MASTER_MONO);
              PRIVATE_SETTINGS.add(MASTER_BALANCE);
              PRIVATE_SETTINGS.add(NOTIFICATIONS_USE_RING_VOLUME);
              PRIVATE_SETTINGS.add(VIBRATE_IN_SILENT);
              PRIVATE_SETTINGS.add(MEDIA_BUTTON_RECEIVER);
              PRIVATE_SETTINGS.add(HIDE_ROTATION_LOCK_TOGGLE_FOR_ACCESSIBILITY);
              PRIVATE_SETTINGS.add(DTMF_TONE_TYPE_WHEN_DIALING);
              PRIVATE_SETTINGS.add(HEARING_AID);
              PRIVATE_SETTINGS.add(TTY_MODE);
              PRIVATE_SETTINGS.add(NOTIFICATION_LIGHT_PULSE);
              PRIVATE_SETTINGS.add(POINTER_LOCATION);
              PRIVATE_SETTINGS.add(SHOW_TOUCHES);
              PRIVATE_SETTINGS.add(WINDOW_ORIENTATION_LISTENER_LOG);
              PRIVATE_SETTINGS.add(POWER_SOUNDS_ENABLED);
              PRIVATE_SETTINGS.add(DOCK_SOUNDS_ENABLED);
              PRIVATE_SETTINGS.add(LOCKSCREEN_SOUNDS_ENABLED);
              PRIVATE_SETTINGS.add(LOCKSCREEN_DISABLED);
              PRIVATE_SETTINGS.add(LOW_BATTERY_SOUND);
              PRIVATE_SETTINGS.add(DESK_DOCK_SOUND);
              PRIVATE_SETTINGS.add(DESK_UNDOCK_SOUND);
              PRIVATE_SETTINGS.add(CAR_DOCK_SOUND);
              PRIVATE_SETTINGS.add(CAR_UNDOCK_SOUND);
              PRIVATE_SETTINGS.add(LOCK_SOUND);
              PRIVATE_SETTINGS.add(UNLOCK_SOUND);
              PRIVATE_SETTINGS.add(SIP_RECEIVE_CALLS);
              PRIVATE_SETTINGS.add(SIP_CALL_OPTIONS);
              PRIVATE_SETTINGS.add(SIP_ALWAYS);
              PRIVATE_SETTINGS.add(SIP_ADDRESS_ONLY);
              PRIVATE_SETTINGS.add(SIP_ASK_ME_EACH_TIME);
              PRIVATE_SETTINGS.add(POINTER_SPEED);
              PRIVATE_SETTINGS.add(LOCK_TO_APP_ENABLED);
              PRIVATE_SETTINGS.add(EGG_MODE);
              PRIVATE_SETTINGS.add(SHOW_BATTERY_PERCENT);
              PRIVATE_SETTINGS.add(DISPLAY_COLOR_MODE);
          }
  
          /**
           * These are all public system settings
           *
           * All settings in {@link SETTINGS_TO_BACKUP} array *must* have a non-null validator,
           * otherwise they won't be restored.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final Map<String, Validator> VALIDATORS = new ArrayMap<>();
          static {
              VALIDATORS.put(STAY_ON_WHILE_PLUGGED_IN, STAY_ON_WHILE_PLUGGED_IN_VALIDATOR);
              VALIDATORS.put(END_BUTTON_BEHAVIOR, END_BUTTON_BEHAVIOR_VALIDATOR);
              VALIDATORS.put(WIFI_USE_STATIC_IP, WIFI_USE_STATIC_IP_VALIDATOR);
              VALIDATORS.put(BLUETOOTH_DISCOVERABILITY, BLUETOOTH_DISCOVERABILITY_VALIDATOR);
              VALIDATORS.put(BLUETOOTH_DISCOVERABILITY_TIMEOUT,
                      BLUETOOTH_DISCOVERABILITY_TIMEOUT_VALIDATOR);
              VALIDATORS.put(NEXT_ALARM_FORMATTED, NEXT_ALARM_FORMATTED_VALIDATOR);
              VALIDATORS.put(FONT_SCALE, FONT_SCALE_VALIDATOR);
              VALIDATORS.put(DIM_SCREEN, DIM_SCREEN_VALIDATOR);
              VALIDATORS.put(DISPLAY_COLOR_MODE, DISPLAY_COLOR_MODE_VALIDATOR);
              VALIDATORS.put(SCREEN_OFF_TIMEOUT, SCREEN_OFF_TIMEOUT_VALIDATOR);
              VALIDATORS.put(SCREEN_BRIGHTNESS_FOR_VR, SCREEN_BRIGHTNESS_FOR_VR_VALIDATOR);
              VALIDATORS.put(SCREEN_BRIGHTNESS_MODE, SCREEN_BRIGHTNESS_MODE_VALIDATOR);
              VALIDATORS.put(ADAPTIVE_SLEEP, ADAPTIVE_SLEEP_VALIDATOR);
              VALIDATORS.put(MODE_RINGER_STREAMS_AFFECTED, MODE_RINGER_STREAMS_AFFECTED_VALIDATOR);
              VALIDATORS.put(MUTE_STREAMS_AFFECTED, MUTE_STREAMS_AFFECTED_VALIDATOR);
              VALIDATORS.put(VIBRATE_ON, VIBRATE_ON_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_VIBRATION_INTENSITY, VIBRATION_INTENSITY_VALIDATOR);
              VALIDATORS.put(RING_VIBRATION_INTENSITY, VIBRATION_INTENSITY_VALIDATOR);
              VALIDATORS.put(HAPTIC_FEEDBACK_INTENSITY, VIBRATION_INTENSITY_VALIDATOR);
              VALIDATORS.put(RINGTONE, RINGTONE_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_SOUND, NOTIFICATION_SOUND_VALIDATOR);
              VALIDATORS.put(ALARM_ALERT, ALARM_ALERT_VALIDATOR);
              VALIDATORS.put(TEXT_AUTO_REPLACE, TEXT_AUTO_REPLACE_VALIDATOR);
              VALIDATORS.put(TEXT_AUTO_CAPS, TEXT_AUTO_CAPS_VALIDATOR);
              VALIDATORS.put(TEXT_AUTO_PUNCTUATE, TEXT_AUTO_PUNCTUATE_VALIDATOR);
              VALIDATORS.put(TEXT_SHOW_PASSWORD, TEXT_SHOW_PASSWORD_VALIDATOR);
              VALIDATORS.put(AUTO_TIME, AUTO_TIME_VALIDATOR);
              VALIDATORS.put(AUTO_TIME_ZONE, AUTO_TIME_ZONE_VALIDATOR);
              VALIDATORS.put(SHOW_GTALK_SERVICE_STATUS, SHOW_GTALK_SERVICE_STATUS_VALIDATOR);
              VALIDATORS.put(WALLPAPER_ACTIVITY, WALLPAPER_ACTIVITY_VALIDATOR);
              VALIDATORS.put(TIME_12_24, TIME_12_24_VALIDATOR);
              VALIDATORS.put(DATE_FORMAT, DATE_FORMAT_VALIDATOR);
              VALIDATORS.put(SETUP_WIZARD_HAS_RUN, SETUP_WIZARD_HAS_RUN_VALIDATOR);
              VALIDATORS.put(ACCELEROMETER_ROTATION, ACCELEROMETER_ROTATION_VALIDATOR);
              VALIDATORS.put(USER_ROTATION, USER_ROTATION_VALIDATOR);
              VALIDATORS.put(DTMF_TONE_WHEN_DIALING, DTMF_TONE_WHEN_DIALING_VALIDATOR);
              VALIDATORS.put(SOUND_EFFECTS_ENABLED, SOUND_EFFECTS_ENABLED_VALIDATOR);
              VALIDATORS.put(HAPTIC_FEEDBACK_ENABLED, HAPTIC_FEEDBACK_ENABLED_VALIDATOR);
              VALIDATORS.put(POWER_SOUNDS_ENABLED, POWER_SOUNDS_ENABLED_VALIDATOR);
              VALIDATORS.put(DOCK_SOUNDS_ENABLED, DOCK_SOUNDS_ENABLED_VALIDATOR);
              VALIDATORS.put(SHOW_WEB_SUGGESTIONS, SHOW_WEB_SUGGESTIONS_VALIDATOR);
              VALIDATORS.put(WIFI_USE_STATIC_IP, WIFI_USE_STATIC_IP_VALIDATOR);
              VALIDATORS.put(END_BUTTON_BEHAVIOR, END_BUTTON_BEHAVIOR_VALIDATOR);
              VALIDATORS.put(ADVANCED_SETTINGS, ADVANCED_SETTINGS_VALIDATOR);
              VALIDATORS.put(SCREEN_AUTO_BRIGHTNESS_ADJ, SCREEN_AUTO_BRIGHTNESS_ADJ_VALIDATOR);
              VALIDATORS.put(VIBRATE_INPUT_DEVICES, VIBRATE_INPUT_DEVICES_VALIDATOR);
              VALIDATORS.put(MASTER_MONO, MASTER_MONO_VALIDATOR);
              VALIDATORS.put(MASTER_BALANCE, MASTER_BALANCE_VALIDATOR);
              VALIDATORS.put(NOTIFICATIONS_USE_RING_VOLUME, NOTIFICATIONS_USE_RING_VOLUME_VALIDATOR);
              VALIDATORS.put(VIBRATE_IN_SILENT, VIBRATE_IN_SILENT_VALIDATOR);
              VALIDATORS.put(MEDIA_BUTTON_RECEIVER, MEDIA_BUTTON_RECEIVER_VALIDATOR);
              VALIDATORS.put(HIDE_ROTATION_LOCK_TOGGLE_FOR_ACCESSIBILITY,
                      HIDE_ROTATION_LOCK_TOGGLE_FOR_ACCESSIBILITY_VALIDATOR);
              VALIDATORS.put(VIBRATE_WHEN_RINGING, VIBRATE_WHEN_RINGING_VALIDATOR);
              VALIDATORS.put(DTMF_TONE_TYPE_WHEN_DIALING, DTMF_TONE_TYPE_WHEN_DIALING_VALIDATOR);
              VALIDATORS.put(HEARING_AID, HEARING_AID_VALIDATOR);
              VALIDATORS.put(TTY_MODE, TTY_MODE_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_LIGHT_PULSE, NOTIFICATION_LIGHT_PULSE_VALIDATOR);
              VALIDATORS.put(POINTER_LOCATION, POINTER_LOCATION_VALIDATOR);
              VALIDATORS.put(SHOW_TOUCHES, SHOW_TOUCHES_VALIDATOR);
              VALIDATORS.put(WINDOW_ORIENTATION_LISTENER_LOG,
                      WINDOW_ORIENTATION_LISTENER_LOG_VALIDATOR);
              VALIDATORS.put(LOCKSCREEN_SOUNDS_ENABLED, LOCKSCREEN_SOUNDS_ENABLED_VALIDATOR);
              VALIDATORS.put(LOCKSCREEN_DISABLED, LOCKSCREEN_DISABLED_VALIDATOR);
              VALIDATORS.put(SIP_RECEIVE_CALLS, SIP_RECEIVE_CALLS_VALIDATOR);
              VALIDATORS.put(SIP_CALL_OPTIONS, SIP_CALL_OPTIONS_VALIDATOR);
              VALIDATORS.put(SIP_ALWAYS, SIP_ALWAYS_VALIDATOR);
              VALIDATORS.put(SIP_ADDRESS_ONLY, SIP_ADDRESS_ONLY_VALIDATOR);
              VALIDATORS.put(SIP_ASK_ME_EACH_TIME, SIP_ASK_ME_EACH_TIME_VALIDATOR);
              VALIDATORS.put(POINTER_SPEED, POINTER_SPEED_VALIDATOR);
              VALIDATORS.put(LOCK_TO_APP_ENABLED, LOCK_TO_APP_ENABLED_VALIDATOR);
              VALIDATORS.put(EGG_MODE, EGG_MODE_VALIDATOR);
              VALIDATORS.put(WIFI_STATIC_IP, WIFI_STATIC_IP_VALIDATOR);
              VALIDATORS.put(WIFI_STATIC_GATEWAY, WIFI_STATIC_GATEWAY_VALIDATOR);
              VALIDATORS.put(WIFI_STATIC_NETMASK, WIFI_STATIC_NETMASK_VALIDATOR);
              VALIDATORS.put(WIFI_STATIC_DNS1, WIFI_STATIC_DNS1_VALIDATOR);
              VALIDATORS.put(WIFI_STATIC_DNS2, WIFI_STATIC_DNS2_VALIDATOR);
              VALIDATORS.put(SHOW_BATTERY_PERCENT, SHOW_BATTERY_PERCENT_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_LIGHT_PULSE, BOOLEAN_VALIDATOR);
          }
  
          /**
           * These entries are considered common between the personal and the managed profile,
           * since the managed profile doesn't get to change them.
           */
          @UnsupportedAppUsage
          private static final Set<String> CLONE_TO_MANAGED_PROFILE = new ArraySet<>();
          static {
              CLONE_TO_MANAGED_PROFILE.add(DATE_FORMAT);
              CLONE_TO_MANAGED_PROFILE.add(HAPTIC_FEEDBACK_ENABLED);
              CLONE_TO_MANAGED_PROFILE.add(SOUND_EFFECTS_ENABLED);
              CLONE_TO_MANAGED_PROFILE.add(TEXT_SHOW_PASSWORD);
              CLONE_TO_MANAGED_PROFILE.add(TIME_12_24);
          }
  
          /** @hide */
          public static void getCloneToManagedProfileSettings(Set<String> outKeySet) {
              outKeySet.addAll(CLONE_TO_MANAGED_PROFILE);
          }
  
          /**
           * These entries should be cloned from this profile's parent only if the dependency's
           * value is true ("1")
           *
           * Note: the dependencies must be Secure settings
           *
           * @hide
           */
          public static final Map<String, String> CLONE_FROM_PARENT_ON_VALUE = new ArrayMap<>();
          static {
              CLONE_FROM_PARENT_ON_VALUE.put(RINGTONE, Secure.SYNC_PARENT_SOUNDS);
              CLONE_FROM_PARENT_ON_VALUE.put(NOTIFICATION_SOUND, Secure.SYNC_PARENT_SOUNDS);
              CLONE_FROM_PARENT_ON_VALUE.put(ALARM_ALERT, Secure.SYNC_PARENT_SOUNDS);
          }
  
          /** @hide */
          public static void getCloneFromParentOnValueSettings(Map<String, String> outMap) {
              outMap.putAll(CLONE_FROM_PARENT_ON_VALUE);
          }
  
          /**
           * System settings which can be accessed by instant apps.
           * @hide
           */
          public static final Set<String> INSTANT_APP_SETTINGS = new ArraySet<>();
          static {
              INSTANT_APP_SETTINGS.add(TEXT_AUTO_REPLACE);
              INSTANT_APP_SETTINGS.add(TEXT_AUTO_CAPS);
              INSTANT_APP_SETTINGS.add(TEXT_AUTO_PUNCTUATE);
              INSTANT_APP_SETTINGS.add(TEXT_SHOW_PASSWORD);
              INSTANT_APP_SETTINGS.add(DATE_FORMAT);
              INSTANT_APP_SETTINGS.add(FONT_SCALE);
              INSTANT_APP_SETTINGS.add(HAPTIC_FEEDBACK_ENABLED);
              INSTANT_APP_SETTINGS.add(TIME_12_24);
              INSTANT_APP_SETTINGS.add(SOUND_EFFECTS_ENABLED);
              INSTANT_APP_SETTINGS.add(ACCELEROMETER_ROTATION);
          }
  
          /**
           * When to use Wi-Fi calling
           *
           * @see android.telephony.TelephonyManager.WifiCallingChoices
           * @hide
           */
          public static final String WHEN_TO_MAKE_WIFI_CALLS = "when_to_make_wifi_calls";
  
          // Settings moved to Settings.Secure
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#ADB_ENABLED}
           * instead
           */
          @Deprecated
          public static final String ADB_ENABLED = Global.ADB_ENABLED;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#ANDROID_ID} instead
           */
          @Deprecated
          public static final String ANDROID_ID = Secure.ANDROID_ID;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#BLUETOOTH_ON} instead
           */
          @Deprecated
          public static final String BLUETOOTH_ON = Global.BLUETOOTH_ON;
  
          private static final Validator BLUETOOTH_ON_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#DATA_ROAMING} instead
           */
          @Deprecated
          public static final String DATA_ROAMING = Global.DATA_ROAMING;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#DEVICE_PROVISIONED} instead
           */
          @Deprecated
          public static final String DEVICE_PROVISIONED = Global.DEVICE_PROVISIONED;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#HTTP_PROXY} instead
           */
          @Deprecated
          public static final String HTTP_PROXY = Global.HTTP_PROXY;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#INSTALL_NON_MARKET_APPS} instead
           */
          @Deprecated
          public static final String INSTALL_NON_MARKET_APPS = Secure.INSTALL_NON_MARKET_APPS;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#LOCATION_PROVIDERS_ALLOWED}
           * instead
           */
          @Deprecated
          public static final String LOCATION_PROVIDERS_ALLOWED = Secure.LOCATION_PROVIDERS_ALLOWED;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#LOGGING_ID} instead
           */
          @Deprecated
          public static final String LOGGING_ID = Secure.LOGGING_ID;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#NETWORK_PREFERENCE} instead
           */
          @Deprecated
          public static final String NETWORK_PREFERENCE = Global.NETWORK_PREFERENCE;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#PARENTAL_CONTROL_ENABLED}
           * instead
           */
          @Deprecated
          public static final String PARENTAL_CONTROL_ENABLED = Secure.PARENTAL_CONTROL_ENABLED;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#PARENTAL_CONTROL_LAST_UPDATE}
           * instead
           */
          @Deprecated
          public static final String PARENTAL_CONTROL_LAST_UPDATE = Secure.PARENTAL_CONTROL_LAST_UPDATE;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#PARENTAL_CONTROL_REDIRECT_URL}
           * instead
           */
          @Deprecated
          public static final String PARENTAL_CONTROL_REDIRECT_URL =
              Secure.PARENTAL_CONTROL_REDIRECT_URL;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#SETTINGS_CLASSNAME} instead
           */
          @Deprecated
          public static final String SETTINGS_CLASSNAME = Secure.SETTINGS_CLASSNAME;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#USB_MASS_STORAGE_ENABLED} instead
           */
          @Deprecated
          public static final String USB_MASS_STORAGE_ENABLED = Global.USB_MASS_STORAGE_ENABLED;
  
          private static final Validator USB_MASS_STORAGE_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#USE_GOOGLE_MAIL} instead
           */
          @Deprecated
          public static final String USE_GOOGLE_MAIL = Global.USE_GOOGLE_MAIL;
  
         /**
           * @deprecated Use
           * {@link android.provider.Settings.Global#WIFI_MAX_DHCP_RETRY_COUNT} instead
           */
          @Deprecated
          public static final String WIFI_MAX_DHCP_RETRY_COUNT = Global.WIFI_MAX_DHCP_RETRY_COUNT;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Global#WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS} instead
           */
          @Deprecated
          public static final String WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS =
                  Global.WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Global#WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON} instead
           */
          @Deprecated
          public static final String WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON =
                  Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON;
  
          private static final Validator WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Global#WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY} instead
           */
          @Deprecated
          public static final String WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY =
                  Global.WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY;
  
          private static final Validator WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_NUM_OPEN_NETWORKS_KEPT}
           * instead
           */
          @Deprecated
          public static final String WIFI_NUM_OPEN_NETWORKS_KEPT = Global.WIFI_NUM_OPEN_NETWORKS_KEPT;
  
          private static final Validator WIFI_NUM_OPEN_NETWORKS_KEPT_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_ON} instead
           */
          @Deprecated
          public static final String WIFI_ON = Global.WIFI_ON;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Secure#WIFI_WATCHDOG_ACCEPTABLE_PACKET_LOSS_PERCENTAGE}
           * instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_ACCEPTABLE_PACKET_LOSS_PERCENTAGE =
                  Secure.WIFI_WATCHDOG_ACCEPTABLE_PACKET_LOSS_PERCENTAGE;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#WIFI_WATCHDOG_AP_COUNT} instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_AP_COUNT = Secure.WIFI_WATCHDOG_AP_COUNT;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Secure#WIFI_WATCHDOG_BACKGROUND_CHECK_DELAY_MS} instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_BACKGROUND_CHECK_DELAY_MS =
                  Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_DELAY_MS;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Secure#WIFI_WATCHDOG_BACKGROUND_CHECK_ENABLED} instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_BACKGROUND_CHECK_ENABLED =
                  Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_ENABLED;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Secure#WIFI_WATCHDOG_BACKGROUND_CHECK_TIMEOUT_MS}
           * instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_BACKGROUND_CHECK_TIMEOUT_MS =
                  Secure.WIFI_WATCHDOG_BACKGROUND_CHECK_TIMEOUT_MS;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Secure#WIFI_WATCHDOG_INITIAL_IGNORED_PING_COUNT} instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_INITIAL_IGNORED_PING_COUNT =
              Secure.WIFI_WATCHDOG_INITIAL_IGNORED_PING_COUNT;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#WIFI_WATCHDOG_MAX_AP_CHECKS}
           * instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_MAX_AP_CHECKS = Secure.WIFI_WATCHDOG_MAX_AP_CHECKS;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_WATCHDOG_ON} instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_ON = Global.WIFI_WATCHDOG_ON;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#WIFI_WATCHDOG_PING_COUNT} instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_PING_COUNT = Secure.WIFI_WATCHDOG_PING_COUNT;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#WIFI_WATCHDOG_PING_DELAY_MS}
           * instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_PING_DELAY_MS = Secure.WIFI_WATCHDOG_PING_DELAY_MS;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#WIFI_WATCHDOG_PING_TIMEOUT_MS}
           * instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_PING_TIMEOUT_MS =
              Secure.WIFI_WATCHDOG_PING_TIMEOUT_MS;
  
          /**
           * Checks if the specified app can modify system settings. As of API
           * level 23, an app cannot modify system settings unless it declares the
           * {@link android.Manifest.permission#WRITE_SETTINGS}
           * permission in its manifest, <em>and</em> the user specifically grants
           * the app this capability. To prompt the user to grant this approval,
           * the app must send an intent with the action {@link
           * android.provider.Settings#ACTION_MANAGE_WRITE_SETTINGS}, which causes
           * the system to display a permission management screen.
           *
           * @param context App context.
           * @return true if the calling app can write to system settings, false otherwise
           */
          public static boolean canWrite(Context context) {
              return isCallingPackageAllowedToWriteSettings(context, Process.myUid(),
                      context.getOpPackageName(), false);
          }
      }
  
      /**
       * Secure system settings, containing system preferences that applications
       * can read but are not allowed to write.  These are for preferences that
       * the user must explicitly modify through the system UI or specialized
       * APIs for those values, not modified directly by applications.
       */
      public static final class Secure extends NameValueTable {
          // NOTE: If you add new settings here, be sure to add them to
          // com.android.providers.settings.SettingsProtoDumpUtil#dumpProtoSecureSettingsLocked.
  
          /**
           * The content:// style URL for this table
           */
          public static final Uri CONTENT_URI =
              Uri.parse("content://" + AUTHORITY + "/secure");
  
          @UnsupportedAppUsage
          private static final ContentProviderHolder sProviderHolder =
                  new ContentProviderHolder(CONTENT_URI);
  
          // Populated lazily, guarded by class object:
          @UnsupportedAppUsage
          private static final NameValueCache sNameValueCache = new NameValueCache(
                  CONTENT_URI,
                  CALL_METHOD_GET_SECURE,
                  CALL_METHOD_PUT_SECURE,
                  sProviderHolder);
  
          private static ILockSettings sLockSettings = null;
  
          private static boolean sIsSystemProcess;
          @UnsupportedAppUsage
          private static final HashSet<String> MOVED_TO_LOCK_SETTINGS;
          @UnsupportedAppUsage
          private static final HashSet<String> MOVED_TO_GLOBAL;
          static {
              MOVED_TO_LOCK_SETTINGS = new HashSet<>(3);
              MOVED_TO_LOCK_SETTINGS.add(Secure.LOCK_PATTERN_ENABLED);
              MOVED_TO_LOCK_SETTINGS.add(Secure.LOCK_PATTERN_VISIBLE);
              MOVED_TO_LOCK_SETTINGS.add(Secure.LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED);
  
              MOVED_TO_GLOBAL = new HashSet<>();
              MOVED_TO_GLOBAL.add(Settings.Global.ADB_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.ASSISTED_GPS_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.BLUETOOTH_ON);
              MOVED_TO_GLOBAL.add(Settings.Global.BUGREPORT_IN_POWER_MENU);
              MOVED_TO_GLOBAL.add(Settings.Global.CDMA_CELL_BROADCAST_SMS);
              MOVED_TO_GLOBAL.add(Settings.Global.CDMA_ROAMING_MODE);
              MOVED_TO_GLOBAL.add(Settings.Global.CDMA_SUBSCRIPTION_MODE);
              MOVED_TO_GLOBAL.add(Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE);
              MOVED_TO_GLOBAL.add(Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI);
              MOVED_TO_GLOBAL.add(Settings.Global.DATA_ROAMING);
              MOVED_TO_GLOBAL.add(Settings.Global.DEVELOPMENT_SETTINGS_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.DEVICE_PROVISIONED);
              MOVED_TO_GLOBAL.add(Settings.Global.DISPLAY_SIZE_FORCED);
              MOVED_TO_GLOBAL.add(Settings.Global.DOWNLOAD_MAX_BYTES_OVER_MOBILE);
              MOVED_TO_GLOBAL.add(Settings.Global.DOWNLOAD_RECOMMENDED_MAX_BYTES_OVER_MOBILE);
              MOVED_TO_GLOBAL.add(Settings.Global.MOBILE_DATA);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_DEV_BUCKET_DURATION);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_DEV_DELETE_AGE);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_DEV_PERSIST_BYTES);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_DEV_ROTATE_AGE);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_GLOBAL_ALERT_BYTES);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_POLL_INTERVAL);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_SAMPLE_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_TIME_CACHE_MAX_AGE);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_UID_BUCKET_DURATION);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_UID_DELETE_AGE);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_UID_PERSIST_BYTES);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_UID_ROTATE_AGE);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_UID_TAG_BUCKET_DURATION);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_UID_TAG_DELETE_AGE);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_UID_TAG_PERSIST_BYTES);
              MOVED_TO_GLOBAL.add(Settings.Global.NETSTATS_UID_TAG_ROTATE_AGE);
              MOVED_TO_GLOBAL.add(Settings.Global.NETWORK_PREFERENCE);
              MOVED_TO_GLOBAL.add(Settings.Global.NITZ_UPDATE_DIFF);
              MOVED_TO_GLOBAL.add(Settings.Global.NITZ_UPDATE_SPACING);
              MOVED_TO_GLOBAL.add(Settings.Global.NTP_SERVER);
              MOVED_TO_GLOBAL.add(Settings.Global.NTP_TIMEOUT);
              MOVED_TO_GLOBAL.add(Settings.Global.PDP_WATCHDOG_ERROR_POLL_COUNT);
              MOVED_TO_GLOBAL.add(Settings.Global.PDP_WATCHDOG_LONG_POLL_INTERVAL_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.PDP_WATCHDOG_MAX_PDP_RESET_FAIL_COUNT);
              MOVED_TO_GLOBAL.add(Settings.Global.PDP_WATCHDOG_POLL_INTERVAL_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.PDP_WATCHDOG_TRIGGER_PACKET_COUNT);
              MOVED_TO_GLOBAL.add(Settings.Global.SETUP_PREPAID_DATA_SERVICE_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.SETUP_PREPAID_DETECTION_REDIR_HOST);
              MOVED_TO_GLOBAL.add(Settings.Global.SETUP_PREPAID_DETECTION_TARGET_URL);
              MOVED_TO_GLOBAL.add(Settings.Global.TETHER_DUN_APN);
              MOVED_TO_GLOBAL.add(Settings.Global.TETHER_DUN_REQUIRED);
              MOVED_TO_GLOBAL.add(Settings.Global.TETHER_SUPPORTED);
              MOVED_TO_GLOBAL.add(Settings.Global.USB_MASS_STORAGE_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.USE_GOOGLE_MAIL);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_COUNTRY_CODE);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_FRAMEWORK_SCAN_INTERVAL_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_FREQUENCY_BAND);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_IDLE_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_MAX_DHCP_RETRY_COUNT);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_NUM_OPEN_NETWORKS_KEPT);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_ON);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_P2P_DEVICE_NAME);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_SAVED_STATE);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_SUPPLICANT_SCAN_INTERVAL_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_SUSPEND_OPTIMIZATIONS_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_VERBOSE_LOGGING_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_ENHANCED_AUTO_JOIN);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_NETWORK_SHOW_RSSI);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_WATCHDOG_ON);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_WATCHDOG_POOR_NETWORK_TEST_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.WIFI_P2P_PENDING_FACTORY_RESET);
              MOVED_TO_GLOBAL.add(Settings.Global.WIMAX_NETWORKS_AVAILABLE_NOTIFICATION_ON);
              MOVED_TO_GLOBAL.add(Settings.Global.PACKAGE_VERIFIER_ENABLE);
              MOVED_TO_GLOBAL.add(Settings.Global.PACKAGE_VERIFIER_TIMEOUT);
              MOVED_TO_GLOBAL.add(Settings.Global.PACKAGE_VERIFIER_DEFAULT_RESPONSE);
              MOVED_TO_GLOBAL.add(Settings.Global.DATA_STALL_ALARM_NON_AGGRESSIVE_DELAY_IN_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.DATA_STALL_ALARM_AGGRESSIVE_DELAY_IN_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.GPRS_REGISTER_CHECK_PERIOD_MS);
              MOVED_TO_GLOBAL.add(Settings.Global.WTF_IS_FATAL);
              MOVED_TO_GLOBAL.add(Settings.Global.BATTERY_DISCHARGE_DURATION_THRESHOLD);
              MOVED_TO_GLOBAL.add(Settings.Global.BATTERY_DISCHARGE_THRESHOLD);
              MOVED_TO_GLOBAL.add(Settings.Global.SEND_ACTION_APP_ERROR);
              MOVED_TO_GLOBAL.add(Settings.Global.DROPBOX_AGE_SECONDS);
              MOVED_TO_GLOBAL.add(Settings.Global.DROPBOX_MAX_FILES);
              MOVED_TO_GLOBAL.add(Settings.Global.DROPBOX_QUOTA_KB);
              MOVED_TO_GLOBAL.add(Settings.Global.DROPBOX_QUOTA_PERCENT);
              MOVED_TO_GLOBAL.add(Settings.Global.DROPBOX_RESERVE_PERCENT);
              MOVED_TO_GLOBAL.add(Settings.Global.DROPBOX_TAG_PREFIX);
              MOVED_TO_GLOBAL.add(Settings.Global.ERROR_LOGCAT_PREFIX);
              MOVED_TO_GLOBAL.add(Settings.Global.SYS_FREE_STORAGE_LOG_INTERVAL);
              MOVED_TO_GLOBAL.add(Settings.Global.DISK_FREE_CHANGE_REPORTING_THRESHOLD);
              MOVED_TO_GLOBAL.add(Settings.Global.SYS_STORAGE_THRESHOLD_PERCENTAGE);
              MOVED_TO_GLOBAL.add(Settings.Global.SYS_STORAGE_THRESHOLD_MAX_BYTES);
              MOVED_TO_GLOBAL.add(Settings.Global.SYS_STORAGE_FULL_THRESHOLD_BYTES);
              MOVED_TO_GLOBAL.add(Settings.Global.SYNC_MAX_RETRY_DELAY_IN_SECONDS);
              MOVED_TO_GLOBAL.add(Settings.Global.CONNECTIVITY_CHANGE_DELAY);
              MOVED_TO_GLOBAL.add(Settings.Global.CAPTIVE_PORTAL_DETECTION_ENABLED);
              MOVED_TO_GLOBAL.add(Settings.Global.CAPTIVE_PORTAL_SERVER);
              MOVED_TO_GLOBAL.add(Settings.Global.NSD_ON);
              MOVED_TO_GLOBAL.add(Settings.Global.SET_INSTALL_LOCATION);
              MOVED_TO_GLOBAL.add(Settings.Global.DEFAULT_INSTALL_LOCATION);
              MOVED_TO_GLOBAL.add(Settings.Global.INET_CONDITION_DEBOUNCE_UP_DELAY);
              MOVED_TO_GLOBAL.add(Settings.Global.INET_CONDITION_DEBOUNCE_DOWN_DELAY);
              MOVED_TO_GLOBAL.add(Settings.Global.READ_EXTERNAL_STORAGE_ENFORCED_DEFAULT);
              MOVED_TO_GLOBAL.add(Settings.Global.HTTP_PROXY);
              MOVED_TO_GLOBAL.add(Settings.Global.GLOBAL_HTTP_PROXY_HOST);
              MOVED_TO_GLOBAL.add(Settings.Global.GLOBAL_HTTP_PROXY_PORT);
              MOVED_TO_GLOBAL.add(Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST);
              MOVED_TO_GLOBAL.add(Settings.Global.SET_GLOBAL_HTTP_PROXY);
              MOVED_TO_GLOBAL.add(Settings.Global.DEFAULT_DNS_SERVER);
              MOVED_TO_GLOBAL.add(Settings.Global.PREFERRED_NETWORK_MODE);
              MOVED_TO_GLOBAL.add(Settings.Global.WEBVIEW_DATA_REDUCTION_PROXY_KEY);
          }
  
          /** @hide */
          public static void getMovedToGlobalSettings(Set<String> outKeySet) {
              outKeySet.addAll(MOVED_TO_GLOBAL);
          }
  
          /** @hide */
          public static void clearProviderForTest() {
              sProviderHolder.clearProviderForTest();
              sNameValueCache.clearGenerationTrackerForTest();
          }
  
          /**
           * Look up a name in the database.
           * @param resolver to access the database with
           * @param name to look up in the table
           * @return the corresponding value, or null if not present
           */
          public static String getString(ContentResolver resolver, String name) {
              return getStringForUser(resolver, name, resolver.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static String getStringForUser(ContentResolver resolver, String name,
                  int userHandle) {
              if (MOVED_TO_GLOBAL.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.Secure"
                          + " to android.provider.Settings.Global.");
                  return Global.getStringForUser(resolver, name, userHandle);
              }
  
              if (MOVED_TO_LOCK_SETTINGS.contains(name)) {
                  synchronized (Secure.class) {
                      if (sLockSettings == null) {
                          sLockSettings = ILockSettings.Stub.asInterface(
                                  (IBinder) ServiceManager.getService("lock_settings"));
                          sIsSystemProcess = Process.myUid() == Process.SYSTEM_UID;
                      }
                  }
                  if (sLockSettings != null && !sIsSystemProcess) {
                      // No context; use the ActivityThread's context as an approximation for
                      // determining the target API level.
                      Application application = ActivityThread.currentApplication();
  
                      boolean isPreMnc = application != null
                              && application.getApplicationInfo() != null
                              && application.getApplicationInfo().targetSdkVersion
                              <= VERSION_CODES.LOLLIPOP_MR1;
                      if (isPreMnc) {
                          try {
                              return sLockSettings.getString(name, "0", userHandle);
                          } catch (RemoteException re) {
                              // Fall through
                          }
                      } else {
                          throw new SecurityException("Settings.Secure." + name
                                  + " is deprecated and no longer accessible."
                                  + " See API documentation for potential replacements.");
                      }
                  }
              }
  
              return sNameValueCache.getStringForUser(resolver, name, userHandle);
          }
  
          /**
           * Store a name/value pair into the database.
           * @param resolver to access the database with
           * @param name to store
           * @param value to associate with the name
           * @return true if the value was set, false on database errors
           */
          public static boolean putString(ContentResolver resolver, String name, String value) {
              return putStringForUser(resolver, name, value, resolver.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static boolean putStringForUser(ContentResolver resolver, String name, String value,
                  int userHandle) {
              return putStringForUser(resolver, name, value, null, false, userHandle);
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static boolean putStringForUser(@NonNull ContentResolver resolver,
                  @NonNull String name, @Nullable String value, @Nullable String tag,
                  boolean makeDefault, @UserIdInt int userHandle) {
              if (MOVED_TO_GLOBAL.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.Secure"
                          + " to android.provider.Settings.Global");
                  return Global.putStringForUser(resolver, name, value,
                          tag, makeDefault, userHandle);
              }
              return sNameValueCache.putStringForUser(resolver, name, value, tag,
                      makeDefault, userHandle);
          }
  
          /**
           * Store a name/value pair into the database.
           * <p>
           * The method takes an optional tag to associate with the setting
           * which can be used to clear only settings made by your package and
           * associated with this tag by passing the tag to {@link
           * #resetToDefaults(ContentResolver, String)}. Anyone can override
           * the current tag. Also if another package changes the setting
           * then the tag will be set to the one specified in the set call
           * which can be null. Also any of the settings setters that do not
           * take a tag as an argument effectively clears the tag.
           * </p><p>
           * For example, if you set settings A and B with tags T1 and T2 and
           * another app changes setting A (potentially to the same value), it
           * can assign to it a tag T3 (note that now the package that changed
           * the setting is not yours). Now if you reset your changes for T1 and
           * T2 only setting B will be reset and A not (as it was changed by
           * another package) but since A did not change you are in the desired
           * initial state. Now if the other app changes the value of A (assuming
           * you registered an observer in the beginning) you would detect that
           * the setting was changed by another app and handle this appropriately
           * (ignore, set back to some value, etc).
           * </p><p>
           * Also the method takes an argument whether to make the value the
           * default for this setting. If the system already specified a default
           * value, then the one passed in here will <strong>not</strong>
           * be set as the default.
           * </p>
           *
           * @param resolver to access the database with.
           * @param name to store.
           * @param value to associate with the name.
           * @param tag to associate with the setting.
           * @param makeDefault whether to make the value the default one.
           * @return true if the value was set, false on database errors.
           *
           * @see #resetToDefaults(ContentResolver, String)
           *
           * @hide
           */
          @SystemApi
          @RequiresPermission(Manifest.permission.WRITE_SECURE_SETTINGS)
          public static boolean putString(@NonNull ContentResolver resolver,
                  @NonNull String name, @Nullable String value, @Nullable String tag,
                  boolean makeDefault) {
              return putStringForUser(resolver, name, value, tag, makeDefault,
                      resolver.getUserId());
          }
  
          /**
           * Reset the settings to their defaults. This would reset <strong>only</strong>
           * settings set by the caller's package. Think of it of a way to undo your own
           * changes to the global settings. Passing in the optional tag will reset only
           * settings changed by your package and associated with this tag.
           *
           * @param resolver Handle to the content resolver.
           * @param tag Optional tag which should be associated with the settings to reset.
           *
           * @see #putString(ContentResolver, String, String, String, boolean)
           *
           * @hide
           */
          @SystemApi
          @TestApi
          @RequiresPermission(Manifest.permission.WRITE_SECURE_SETTINGS)
          public static void resetToDefaults(@NonNull ContentResolver resolver,
                  @Nullable String tag) {
              resetToDefaultsAsUser(resolver, tag, RESET_MODE_PACKAGE_DEFAULTS,
                      resolver.getUserId());
          }
  
          /**
           *
           * Reset the settings to their defaults for a given user with a specific mode. The
           * optional tag argument is valid only for {@link #RESET_MODE_PACKAGE_DEFAULTS}
           * allowing resetting the settings made by a package and associated with the tag.
           *
           * @param resolver Handle to the content resolver.
           * @param tag Optional tag which should be associated with the settings to reset.
           * @param mode The reset mode.
           * @param userHandle The user for which to reset to defaults.
           *
           * @see #RESET_MODE_PACKAGE_DEFAULTS
           * @see #RESET_MODE_UNTRUSTED_DEFAULTS
           * @see #RESET_MODE_UNTRUSTED_CHANGES
           * @see #RESET_MODE_TRUSTED_DEFAULTS
           *
           * @hide
           */
          public static void resetToDefaultsAsUser(@NonNull ContentResolver resolver,
                  @Nullable String tag, @ResetMode int mode, @IntRange(from = 0) int userHandle) {
              try {
                  Bundle arg = new Bundle();
                  arg.putInt(CALL_METHOD_USER_KEY, userHandle);
                  if (tag != null) {
                      arg.putString(CALL_METHOD_TAG_KEY, tag);
                  }
                  arg.putInt(CALL_METHOD_RESET_MODE_KEY, mode);
                  IContentProvider cp = sProviderHolder.getProvider(resolver);
                  cp.call(resolver.getPackageName(), sProviderHolder.mUri.getAuthority(),
                          CALL_METHOD_RESET_SECURE, null, arg);
              } catch (RemoteException e) {
                  Log.w(TAG, "Can't reset do defaults for " + CONTENT_URI, e);
              }
          }
  
          /**
           * Construct the content URI for a particular name/value pair,
           * useful for monitoring changes with a ContentObserver.
           * @param name to look up in the table
           * @return the corresponding content URI, or null if not present
           */
          public static Uri getUriFor(String name) {
              if (MOVED_TO_GLOBAL.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.Secure"
                          + " to android.provider.Settings.Global, returning global URI.");
                  return Global.getUriFor(Global.CONTENT_URI, name);
              }
              return getUriFor(CONTENT_URI, name);
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as an integer.  Note that internally setting values are always
           * stored as strings; this function converts the string to an integer
           * for you.  The default value will be returned if the setting is
           * not defined or not an integer.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid integer.
           */
          public static int getInt(ContentResolver cr, String name, int def) {
              return getIntForUser(cr, name, def, cr.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static int getIntForUser(ContentResolver cr, String name, int def, int userHandle) {
              String v = getStringForUser(cr, name, userHandle);
              try {
                  return v != null ? Integer.parseInt(v) : def;
              } catch (NumberFormatException e) {
                  return def;
              }
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as an integer.  Note that internally setting values are always
           * stored as strings; this function converts the string to an integer
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not an integer.
           *
           * @return The setting's current value.
           */
          public static int getInt(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              return getIntForUser(cr, name, cr.getUserId());
          }
  
          /** @hide */
          public static int getIntForUser(ContentResolver cr, String name, int userHandle)
                  throws SettingNotFoundException {
              String v = getStringForUser(cr, name, userHandle);
              try {
                  return Integer.parseInt(v);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a single settings value as an
           * integer. This will either create a new entry in the table if the
           * given name does not exist, or modify the value of the existing row
           * with that name.  Note that internally setting values are always
           * stored as strings, so this function converts the given value to a
           * string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putInt(ContentResolver cr, String name, int value) {
              return putIntForUser(cr, name, value, cr.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static boolean putIntForUser(ContentResolver cr, String name, int value,
                  int userHandle) {
              return putStringForUser(cr, name, Integer.toString(value), userHandle);
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as a {@code long}.  Note that internally setting values are always
           * stored as strings; this function converts the string to a {@code long}
           * for you.  The default value will be returned if the setting is
           * not defined or not a {@code long}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid {@code long}.
           */
          public static long getLong(ContentResolver cr, String name, long def) {
              return getLongForUser(cr, name, def, cr.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static long getLongForUser(ContentResolver cr, String name, long def,
                  int userHandle) {
              String valString = getStringForUser(cr, name, userHandle);
              long value;
              try {
                  value = valString != null ? Long.parseLong(valString) : def;
              } catch (NumberFormatException e) {
                  value = def;
              }
              return value;
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as a {@code long}.  Note that internally setting values are always
           * stored as strings; this function converts the string to a {@code long}
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @return The setting's current value.
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not an integer.
           */
          public static long getLong(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              return getLongForUser(cr, name, cr.getUserId());
          }
  
          /** @hide */
          public static long getLongForUser(ContentResolver cr, String name, int userHandle)
                  throws SettingNotFoundException {
              String valString = getStringForUser(cr, name, userHandle);
              try {
                  return Long.parseLong(valString);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a secure settings value as a long
           * integer. This will either create a new entry in the table if the
           * given name does not exist, or modify the value of the existing row
           * with that name.  Note that internally setting values are always
           * stored as strings, so this function converts the given value to a
           * string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putLong(ContentResolver cr, String name, long value) {
              return putLongForUser(cr, name, value, cr.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static boolean putLongForUser(ContentResolver cr, String name, long value,
                  int userHandle) {
              return putStringForUser(cr, name, Long.toString(value), userHandle);
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as a floating point number.  Note that internally setting values are
           * always stored as strings; this function converts the string to an
           * float for you. The default value will be returned if the setting
           * is not defined or not a valid float.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid float.
           */
          public static float getFloat(ContentResolver cr, String name, float def) {
              return getFloatForUser(cr, name, def, cr.getUserId());
          }
  
          /** @hide */
          public static float getFloatForUser(ContentResolver cr, String name, float def,
                  int userHandle) {
              String v = getStringForUser(cr, name, userHandle);
              try {
                  return v != null ? Float.parseFloat(v) : def;
              } catch (NumberFormatException e) {
                  return def;
              }
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as a float.  Note that internally setting values are always
           * stored as strings; this function converts the string to a float
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not a float.
           *
           * @return The setting's current value.
           */
          public static float getFloat(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              return getFloatForUser(cr, name, cr.getUserId());
          }
  
          /** @hide */
          public static float getFloatForUser(ContentResolver cr, String name, int userHandle)
                  throws SettingNotFoundException {
              String v = getStringForUser(cr, name, userHandle);
              if (v == null) {
                  throw new SettingNotFoundException(name);
              }
              try {
                  return Float.parseFloat(v);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a single settings value as a
           * floating point number. This will either create a new entry in the
           * table if the given name does not exist, or modify the value of the
           * existing row with that name.  Note that internally setting values
           * are always stored as strings, so this function converts the given
           * value to a string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putFloat(ContentResolver cr, String name, float value) {
              return putFloatForUser(cr, name, value, cr.getUserId());
          }
  
          /** @hide */
          public static boolean putFloatForUser(ContentResolver cr, String name, float value,
                  int userHandle) {
              return putStringForUser(cr, name, Float.toString(value), userHandle);
          }
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#DEVELOPMENT_SETTINGS_ENABLED}
           * instead
           */
          @Deprecated
          public static final String DEVELOPMENT_SETTINGS_ENABLED =
                  Global.DEVELOPMENT_SETTINGS_ENABLED;
  
          /**
           * When the user has enable the option to have a "bug report" command
           * in the power menu.
           * @deprecated Use {@link android.provider.Settings.Global#BUGREPORT_IN_POWER_MENU} instead
           * @hide
           */
          @Deprecated
          public static final String BUGREPORT_IN_POWER_MENU = "bugreport_in_power_menu";
  
          private static final Validator BUGREPORT_IN_POWER_MENU_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#ADB_ENABLED} instead
           */
          @Deprecated
          public static final String ADB_ENABLED = Global.ADB_ENABLED;
  
          /**
           * Setting to allow mock locations and location provider status to be injected into the
           * LocationManager service for testing purposes during application development.  These
           * locations and status values  override actual location and status information generated
           * by network, gps, or other location providers.
           *
           * @deprecated This settings is not used anymore.
           */
          @Deprecated
          public static final String ALLOW_MOCK_LOCATION = "mock_location";
  
          private static final Validator ALLOW_MOCK_LOCATION_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Setting to indicate that on device captions are enabled.
           *
           * @hide
           */
          @SystemApi
          public static final String ODI_CAPTIONS_ENABLED = "odi_captions_enabled";
  
          private static final Validator ODI_CAPTIONS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * On Android 8.0 (API level 26) and higher versions of the platform,
           * a 64-bit number (expressed as a hexadecimal string), unique to
           * each combination of app-signing key, user, and device.
           * Values of {@code ANDROID_ID} are scoped by signing key and user.
           * The value may change if a factory reset is performed on the
           * device or if an APK signing key changes.
           *
           * For more information about how the platform handles {@code ANDROID_ID}
           * in Android 8.0 (API level 26) and higher, see <a
           * href="{@docRoot}about/versions/oreo/android-8.0-changes.html#privacy-all">
           * Android 8.0 Behavior Changes</a>.
           *
           * <p class="note"><strong>Note:</strong> For apps that were installed
           * prior to updating the device to a version of Android 8.0
           * (API level 26) or higher, the value of {@code ANDROID_ID} changes
           * if the app is uninstalled and then reinstalled after the OTA.
           * To preserve values across uninstalls after an OTA to Android 8.0
           * or higher, developers can use
           * <a href="{@docRoot}guide/topics/data/keyvaluebackup.html">
           * Key/Value Backup</a>.</p>
           *
           * <p>In versions of the platform lower than Android 8.0 (API level 26),
           * a 64-bit number (expressed as a hexadecimal string) that is randomly
           * generated when the user first sets up the device and should remain
           * constant for the lifetime of the user's device.
           *
           * On devices that have
           * <a href="{@docRoot}about/versions/android-4.2.html#MultipleUsers">
           * multiple users</a>, each user appears as a
           * completely separate device, so the {@code ANDROID_ID} value is
           * unique to each user.</p>
           *
           * <p class="note"><strong>Note:</strong> If the caller is an Instant App the ID is scoped
           * to the Instant App, it is generated when the Instant App is first installed and reset if
           * the user clears the Instant App.
           */
          public static final String ANDROID_ID = "android_id";
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#BLUETOOTH_ON} instead
           */
          @Deprecated
          public static final String BLUETOOTH_ON = Global.BLUETOOTH_ON;
  
          private static final Validator BLUETOOTH_ON_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#DATA_ROAMING} instead
           */
          @Deprecated
          public static final String DATA_ROAMING = Global.DATA_ROAMING;
  
          /**
           * Setting to record the input method used by default, holding the ID
           * of the desired method.
           */
          public static final String DEFAULT_INPUT_METHOD = "default_input_method";
  
          /**
           * Setting to record the input method subtype used by default, holding the ID
           * of the desired method.
           */
          public static final String SELECTED_INPUT_METHOD_SUBTYPE =
                  "selected_input_method_subtype";
  
          /**
           * Setting to record the history of input method subtype, holding the pair of ID of IME
           * and its last used subtype.
           * @hide
           */
          public static final String INPUT_METHODS_SUBTYPE_HISTORY =
                  "input_methods_subtype_history";
  
          /**
           * Setting to record the visibility of input method selector
           */
          public static final String INPUT_METHOD_SELECTOR_VISIBILITY =
                  "input_method_selector_visibility";
  
          /**
           * The currently selected voice interaction service flattened ComponentName.
           * @hide
           */
          @TestApi
          public static final String VOICE_INTERACTION_SERVICE = "voice_interaction_service";
  
          /**
           * The currently selected autofill service flattened ComponentName.
           * @hide
           */
          @TestApi
          public static final String AUTOFILL_SERVICE = "autofill_service";
  
          private static final Validator AUTOFILL_SERVICE_VALIDATOR =
                  NULLABLE_COMPONENT_NAME_VALIDATOR;
  
          /**
           * Boolean indicating if Autofill supports field classification.
           *
           * @see android.service.autofill.AutofillService
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String AUTOFILL_FEATURE_FIELD_CLASSIFICATION =
                  "autofill_field_classification";
  
          /**
           * Boolean indicating if the dark mode dialog shown on first toggle has been seen.
           *
           * @hide
           */
          public static final String DARK_MODE_DIALOG_SEEN =
                  "dark_mode_dialog_seen";
  
          /**
           * Defines value returned by {@link android.service.autofill.UserData#getMaxUserDataSize()}.
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String AUTOFILL_USER_DATA_MAX_USER_DATA_SIZE =
                  "autofill_user_data_max_user_data_size";
  
          /**
           * Defines value returned by
           * {@link android.service.autofill.UserData#getMaxFieldClassificationIdsSize()}.
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String AUTOFILL_USER_DATA_MAX_FIELD_CLASSIFICATION_IDS_SIZE =
                  "autofill_user_data_max_field_classification_size";
  
          /**
           * Defines value returned by
           * {@link android.service.autofill.UserData#getMaxCategoryCount()}.
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String AUTOFILL_USER_DATA_MAX_CATEGORY_COUNT =
                  "autofill_user_data_max_category_count";
  
          /**
           * Defines value returned by {@link android.service.autofill.UserData#getMaxValueLength()}.
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String AUTOFILL_USER_DATA_MAX_VALUE_LENGTH =
                  "autofill_user_data_max_value_length";
  
          /**
           * Defines value returned by {@link android.service.autofill.UserData#getMinValueLength()}.
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String AUTOFILL_USER_DATA_MIN_VALUE_LENGTH =
                  "autofill_user_data_min_value_length";
  
          /**
           * Defines whether Content Capture is enabled for the user.
           *
           * <p>Type: {@code int} ({@code 0} for disabled, {@code 1} for enabled).
           * <p>Default: enabled
           *
           * @hide
           */
          @TestApi
          public static final String CONTENT_CAPTURE_ENABLED = "content_capture_enabled";
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#DEVICE_PROVISIONED} instead
           */
          @Deprecated
          public static final String DEVICE_PROVISIONED = Global.DEVICE_PROVISIONED;
  
          /**
           * Indicates whether a DPC has been downloaded during provisioning.
           *
           * <p>Type: int (0 for false, 1 for true)
           *
           * <p>If this is true, then any attempts to begin setup again should result in factory reset
           *
           * @hide
           */
          public static final String MANAGED_PROVISIONING_DPC_DOWNLOADED =
                  "managed_provisioning_dpc_downloaded";
  
          /**
           * Indicates whether the current user has completed setup via the setup wizard.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String USER_SETUP_COMPLETE = "user_setup_complete";
  
          /**
           * Indicates that the user has not started setup personalization.
           * One of the possible states for {@link #USER_SETUP_PERSONALIZATION_STATE}.
           *
           * @hide
           */
          @SystemApi
          public static final int USER_SETUP_PERSONALIZATION_NOT_STARTED = 0;
  
          /**
           * Indicates that the user has not yet completed setup personalization.
           * One of the possible states for {@link #USER_SETUP_PERSONALIZATION_STATE}.
           *
           * @hide
           */
          @SystemApi
          public static final int USER_SETUP_PERSONALIZATION_STARTED = 1;
  
          /**
           * Indicates that the user has snoozed personalization and will complete it later.
           * One of the possible states for {@link #USER_SETUP_PERSONALIZATION_STATE}.
           *
           * @hide
           */
          @SystemApi
          public static final int USER_SETUP_PERSONALIZATION_PAUSED = 2;
  
          /**
           * Indicates that the user has completed setup personalization.
           * One of the possible states for {@link #USER_SETUP_PERSONALIZATION_STATE}.
           *
           * @hide
           */
          @SystemApi
          public static final int USER_SETUP_PERSONALIZATION_COMPLETE = 10;
  
          /** @hide */
          @Retention(RetentionPolicy.SOURCE)
          @IntDef({
                  USER_SETUP_PERSONALIZATION_NOT_STARTED,
                  USER_SETUP_PERSONALIZATION_STARTED,
                  USER_SETUP_PERSONALIZATION_PAUSED,
                  USER_SETUP_PERSONALIZATION_COMPLETE
          })
          public @interface UserSetupPersonalization {}
  
          /**
           * Defines the user's current state of device personalization.
           * The possible states are defined in {@link UserSetupPersonalization}.
           *
           * @hide
           */
          @SystemApi
          public static final String USER_SETUP_PERSONALIZATION_STATE =
                  "user_setup_personalization_state";
  
          /**
           * Whether the current user has been set up via setup wizard (0 = false, 1 = true)
           * This value differs from USER_SETUP_COMPLETE in that it can be reset back to 0
           * in case SetupWizard has been re-enabled on TV devices.
           *
           * @hide
           */
          public static final String TV_USER_SETUP_COMPLETE = "tv_user_setup_complete";
  
          /**
           * The prefix for a category name that indicates whether a suggested action from that
           * category was marked as completed.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          public static final String COMPLETED_CATEGORY_PREFIX = "suggested.completed_category.";
  
          /**
           * List of input methods that are currently enabled.  This is a string
           * containing the IDs of all enabled input methods, each ID separated
           * by ':'.
           *
           * Format like "ime0;subtype0;subtype1;subtype2:ime1:ime2;subtype0"
           * where imeId is ComponentName and subtype is int32.
           */
          public static final String ENABLED_INPUT_METHODS = "enabled_input_methods";
  
          /**
           * List of system input methods that are currently disabled.  This is a string
           * containing the IDs of all disabled input methods, each ID separated
           * by ':'.
           * @hide
           */
          public static final String DISABLED_SYSTEM_INPUT_METHODS = "disabled_system_input_methods";
  
          /**
           * Whether to show the IME when a hard keyboard is connected. This is a boolean that
           * determines if the IME should be shown when a hard keyboard is attached.
           * @hide
           */
          public static final String SHOW_IME_WITH_HARD_KEYBOARD = "show_ime_with_hard_keyboard";
  
          private static final Validator SHOW_IME_WITH_HARD_KEYBOARD_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Host name and port for global http proxy. Uses ':' seperator for
           * between host and port.
           *
           * @deprecated Use {@link Global#HTTP_PROXY}
           */
          @Deprecated
          public static final String HTTP_PROXY = Global.HTTP_PROXY;
  
          /**
           * Package designated as always-on VPN provider.
           *
           * @hide
           */
          public static final String ALWAYS_ON_VPN_APP = "always_on_vpn_app";
  
          /**
           * Whether to block networking outside of VPN connections while always-on is set.
           * @see #ALWAYS_ON_VPN_APP
           *
           * @hide
           */
          public static final String ALWAYS_ON_VPN_LOCKDOWN = "always_on_vpn_lockdown";
  
          /**
           * Comma separated list of packages that are allowed to access the network when VPN is in
           * lockdown mode but not running.
           * @see #ALWAYS_ON_VPN_LOCKDOWN
           *
           * @hide
           */
          public static final String ALWAYS_ON_VPN_LOCKDOWN_WHITELIST =
                  "always_on_vpn_lockdown_whitelist";
  
          /**
           * Whether applications can be installed for this user via the system's
           * {@link Intent#ACTION_INSTALL_PACKAGE} mechanism.
           *
           * <p>1 = permit app installation via the system package installer intent
           * <p>0 = do not allow use of the package installer
           * @deprecated Starting from {@link android.os.Build.VERSION_CODES#O}, apps should use
           * {@link PackageManager#canRequestPackageInstalls()}
           * @see PackageManager#canRequestPackageInstalls()
           */
          public static final String INSTALL_NON_MARKET_APPS = "install_non_market_apps";
  
          /**
           * A flag to tell {@link com.android.server.devicepolicy.DevicePolicyManagerService} that
           * the default for {@link #INSTALL_NON_MARKET_APPS} is reversed for this user on OTA. So it
           * can set the restriction {@link android.os.UserManager#DISALLOW_INSTALL_UNKNOWN_SOURCES}
           * on behalf of the profile owner if needed to make the change transparent for profile
           * owners.
           *
           * @hide
           */
          public static final String UNKNOWN_SOURCES_DEFAULT_REVERSED =
                  "unknown_sources_default_reversed";
  
          /**
           * Comma-separated list of location providers that are enabled. Do not rely on this value
           * being present or correct, or on ContentObserver notifications on the corresponding Uri.
           *
           * @deprecated The preferred methods for checking provider status and listening for changes
           * are via {@link LocationManager#isProviderEnabled(String)} and
           * {@link LocationManager#PROVIDERS_CHANGED_ACTION}.
           */
          @Deprecated
          public static final String LOCATION_PROVIDERS_ALLOWED = "location_providers_allowed";
  
          /**
           * The current location mode of the device. Do not rely on this value being present or on
           * ContentObserver notifications on the corresponding Uri.
           *
           * @deprecated The preferred methods for checking location mode and listening for changes
           * are via {@link LocationManager#isLocationEnabled()} and
           * {@link LocationManager#MODE_CHANGED_ACTION}.
           */
          @Deprecated
          public static final String LOCATION_MODE = "location_mode";
  
          /**
           * The App or module that changes the location mode.
           * @hide
           */
          public static final String LOCATION_CHANGER = "location_changer";
          /**
           * The location changer is unknown or unable to detect.
           * @hide
           */
          public static final int LOCATION_CHANGER_UNKNOWN = 0;
          /**
           * Location settings in system settings.
           * @hide
           */
          public static final int LOCATION_CHANGER_SYSTEM_SETTINGS = 1;
          /**
           * The location icon in drop down notification drawer.
           * @hide
           */
          public static final int LOCATION_CHANGER_QUICK_SETTINGS = 2;
  
          /**
           * Location mode is off.
           */
          public static final int LOCATION_MODE_OFF = 0;
  
          /**
           * This mode no longer has any distinct meaning, but is interpreted as the location mode is
           * on.
           *
           * @deprecated See {@link #LOCATION_MODE}.
           */
          @Deprecated
          public static final int LOCATION_MODE_SENSORS_ONLY = 1;
  
          /**
           * This mode no longer has any distinct meaning, but is interpreted as the location mode is
           * on.
           *
           * @deprecated See {@link #LOCATION_MODE}.
           */
          @Deprecated
          public static final int LOCATION_MODE_BATTERY_SAVING = 2;
  
          /**
           * This mode no longer has any distinct meaning, but is interpreted as the location mode is
           * on.
           *
           * @deprecated See {@link #LOCATION_MODE}.
           */
          @Deprecated
          public static final int LOCATION_MODE_HIGH_ACCURACY = 3;
  
          /**
           * Location mode is on.
           *
           * @hide
           */
          @SystemApi
          public static final int LOCATION_MODE_ON = LOCATION_MODE_HIGH_ACCURACY;
  
          /**
           * A flag containing settings used for biometric weak
           * @hide
           */
          @Deprecated
          public static final String LOCK_BIOMETRIC_WEAK_FLAGS =
                  "lock_biometric_weak_flags";
  
          /**
           * Whether lock-to-app will lock the keyguard when exiting.
           * @hide
           */
          public static final String LOCK_TO_APP_EXIT_LOCKED = "lock_to_app_exit_locked";
  
          /**
           * Whether autolock is enabled (0 = false, 1 = true)
           *
           * @deprecated Use {@link android.app.KeyguardManager} to determine the state and security
           *             level of the keyguard. Accessing this setting from an app that is targeting
           *             {@link VERSION_CODES#M} or later throws a {@code SecurityException}.
           */
          @Deprecated
          public static final String LOCK_PATTERN_ENABLED = "lock_pattern_autolock";
  
          /**
           * Whether lock pattern is visible as user enters (0 = false, 1 = true)
           *
           * @deprecated Accessing this setting from an app that is targeting
           *             {@link VERSION_CODES#M} or later throws a {@code SecurityException}.
           */
          @Deprecated
          public static final String LOCK_PATTERN_VISIBLE = "lock_pattern_visible_pattern";
  
          /**
           * Whether lock pattern will vibrate as user enters (0 = false, 1 =
           * true)
           *
           * @deprecated Starting in {@link VERSION_CODES#JELLY_BEAN_MR1} the
           *             lockscreen uses
           *             {@link Settings.System#HAPTIC_FEEDBACK_ENABLED}.
           *             Accessing this setting from an app that is targeting
           *             {@link VERSION_CODES#M} or later throws a {@code SecurityException}.
           */
          @Deprecated
          public static final String
                  LOCK_PATTERN_TACTILE_FEEDBACK_ENABLED = "lock_pattern_tactile_feedback_enabled";
  
          /**
           * This preference allows the device to be locked given time after screen goes off,
           * subject to current DeviceAdmin policy limits.
           * @hide
           */
          @UnsupportedAppUsage
          public static final String LOCK_SCREEN_LOCK_AFTER_TIMEOUT = "lock_screen_lock_after_timeout";
  
  
          /**
           * This preference contains the string that shows for owner info on LockScreen.
           * @hide
           * @deprecated
           */
          @Deprecated
          public static final String LOCK_SCREEN_OWNER_INFO = "lock_screen_owner_info";
  
          /**
           * Ids of the user-selected appwidgets on the lockscreen (comma-delimited).
           * @hide
           */
          @Deprecated
          public static final String LOCK_SCREEN_APPWIDGET_IDS =
              "lock_screen_appwidget_ids";
  
          /**
           * Id of the appwidget shown on the lock screen when appwidgets are disabled.
           * @hide
           */
          @Deprecated
          public static final String LOCK_SCREEN_FALLBACK_APPWIDGET_ID =
              "lock_screen_fallback_appwidget_id";
  
          /**
           * Index of the lockscreen appwidget to restore, -1 if none.
           * @hide
           */
          @Deprecated
          public static final String LOCK_SCREEN_STICKY_APPWIDGET =
              "lock_screen_sticky_appwidget";
  
          /**
           * This preference enables showing the owner info on LockScreen.
           * @hide
           * @deprecated
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String LOCK_SCREEN_OWNER_INFO_ENABLED =
              "lock_screen_owner_info_enabled";
  
          /**
           * Indicates whether the user has allowed notifications to be shown atop a securely locked
           * screen in their full "private" form (same as when the device is unlocked).
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          public static final String LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS =
                  "lock_screen_allow_private_notifications";
  
          /**
           * When set by a user, allows notification remote input atop a securely locked screen
           * without having to unlock
           * @hide
           */
          public static final String LOCK_SCREEN_ALLOW_REMOTE_INPUT =
                  "lock_screen_allow_remote_input";
  
          /**
           * Indicates which clock face to show on lock screen and AOD formatted as a serialized
           * {@link org.json.JSONObject} with the format:
           *     {"clock": id, "_applied_timestamp": timestamp}
           * @hide
           */
          public static final String LOCK_SCREEN_CUSTOM_CLOCK_FACE = "lock_screen_custom_clock_face";
  
          private static final Validator LOCK_SCREEN_CUSTOM_CLOCK_FACE_VALIDATOR =
                  SettingsValidators.JSON_OBJECT_VALIDATOR;
  
          /**
           * Indicates which clock face to show on lock screen and AOD while docked.
           * @hide
           */
          public static final String DOCKED_CLOCK_FACE = "docked_clock_face";
  
          /**
           * Set by the system to track if the user needs to see the call to action for
           * the lockscreen notification policy.
           * @hide
           */
          public static final String SHOW_NOTE_ABOUT_NOTIFICATION_HIDING =
                  "show_note_about_notification_hiding";
  
          /**
           * Set to 1 by the system after trust agents have been initialized.
           * @hide
           */
          public static final String TRUST_AGENTS_INITIALIZED =
                  "trust_agents_initialized";
  
          /**
           * The Logging ID (a unique 64-bit value) as a hex string.
           * Used as a pseudonymous identifier for logging.
           * @deprecated This identifier is poorly initialized and has
           * many collisions.  It should not be used.
           */
          @Deprecated
          public static final String LOGGING_ID = "logging_id";
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#NETWORK_PREFERENCE} instead
           */
          @Deprecated
          public static final String NETWORK_PREFERENCE = Global.NETWORK_PREFERENCE;
  
          /**
           * No longer supported.
           */
          public static final String PARENTAL_CONTROL_ENABLED = "parental_control_enabled";
  
          /**
           * No longer supported.
           */
          public static final String PARENTAL_CONTROL_LAST_UPDATE = "parental_control_last_update";
  
          /**
           * No longer supported.
           */
          public static final String PARENTAL_CONTROL_REDIRECT_URL = "parental_control_redirect_url";
  
          /**
           * Settings classname to launch when Settings is clicked from All
           * Applications.  Needed because of user testing between the old
           * and new Settings apps.
           */
          // TODO: 881807
          public static final String SETTINGS_CLASSNAME = "settings_classname";
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#USB_MASS_STORAGE_ENABLED} instead
           */
          @Deprecated
          public static final String USB_MASS_STORAGE_ENABLED = Global.USB_MASS_STORAGE_ENABLED;
  
          private static final Validator USB_MASS_STORAGE_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#USE_GOOGLE_MAIL} instead
           */
          @Deprecated
          public static final String USE_GOOGLE_MAIL = Global.USE_GOOGLE_MAIL;
  
          /**
           * If accessibility is enabled.
           */
          public static final String ACCESSIBILITY_ENABLED = "accessibility_enabled";
  
          private static final Validator ACCESSIBILITY_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Setting specifying if the accessibility shortcut is enabled.
           * @hide
           */
          public static final String ACCESSIBILITY_SHORTCUT_ENABLED =
                  "accessibility_shortcut_enabled";
  
          private static final Validator ACCESSIBILITY_SHORTCUT_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Setting specifying if the accessibility shortcut is enabled.
           * @hide
           */
          public static final String ACCESSIBILITY_SHORTCUT_ON_LOCK_SCREEN =
                  "accessibility_shortcut_on_lock_screen";
  
          private static final Validator ACCESSIBILITY_SHORTCUT_ON_LOCK_SCREEN_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Setting specifying if the accessibility shortcut dialog has been shown to this user.
           * @hide
           */
          public static final String ACCESSIBILITY_SHORTCUT_DIALOG_SHOWN =
                  "accessibility_shortcut_dialog_shown";
  
          private static final Validator ACCESSIBILITY_SHORTCUT_DIALOG_SHOWN_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Setting specifying the accessibility service to be toggled via the accessibility
           * shortcut. Must be its flattened {@link ComponentName}.
           * @hide
           */
          @TestApi
          public static final String ACCESSIBILITY_SHORTCUT_TARGET_SERVICE =
                  "accessibility_shortcut_target_service";
  
          private static final Validator ACCESSIBILITY_SHORTCUT_TARGET_SERVICE_VALIDATOR =
                  NULLABLE_COMPONENT_NAME_VALIDATOR;
  
          /**
           * Setting specifying the accessibility service or feature to be toggled via the
           * accessibility button in the navigation bar. This is either a flattened
           * {@link ComponentName} or the class name of a system class implementing a supported
           * accessibility feature.
           * @hide
           */
          public static final String ACCESSIBILITY_BUTTON_TARGET_COMPONENT =
                  "accessibility_button_target_component";
  
          private static final Validator ACCESSIBILITY_BUTTON_TARGET_COMPONENT_VALIDATOR =
                  new Validator() {
                      @Override
                      public boolean validate(@Nullable String value) {
                          // technically either ComponentName or class name, but there's proper value
                          // validation at callsites, so allow any non-null string
                          return value != null;
                      }
                  };
  
          /**
           * If touch exploration is enabled.
           */
          public static final String TOUCH_EXPLORATION_ENABLED = "touch_exploration_enabled";
  
          private static final Validator TOUCH_EXPLORATION_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * List of the enabled accessibility providers.
           */
          public static final String ENABLED_ACCESSIBILITY_SERVICES =
              "enabled_accessibility_services";
  
          private static final Validator ENABLED_ACCESSIBILITY_SERVICES_VALIDATOR =
                  new SettingsValidators.ComponentNameListValidator(":");
  
          /**
           * List of the accessibility services to which the user has granted
           * permission to put the device into touch exploration mode.
           *
           * @hide
           */
          public static final String TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES =
              "touch_exploration_granted_accessibility_services";
  
          private static final Validator TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES_VALIDATOR =
                  new SettingsValidators.ComponentNameListValidator(":");
  
          /**
           * Whether the Global Actions Panel is enabled.
           * @hide
           */
          public static final String GLOBAL_ACTIONS_PANEL_ENABLED = "global_actions_panel_enabled";
  
          private static final Validator GLOBAL_ACTIONS_PANEL_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the Global Actions Panel can be toggled on or off in Settings.
           * @hide
           */
          public static final String GLOBAL_ACTIONS_PANEL_AVAILABLE =
                  "global_actions_panel_available";
  
          /**
           * Enables debug mode for the Global Actions Panel.
           * @hide
           */
          public static final String GLOBAL_ACTIONS_PANEL_DEBUG_ENABLED =
                  "global_actions_panel_debug_enabled";
  
          /**
           * Whether the hush gesture has ever been used
           * @hide
           */
          @SystemApi
          public static final String HUSH_GESTURE_USED = "hush_gesture_used";
  
          private static final Validator HUSH_GESTURE_USED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Number of times the user has manually clicked the ringer toggle
           * @hide
           */
          public static final String MANUAL_RINGER_TOGGLE_COUNT = "manual_ringer_toggle_count";
  
          private static final Validator MANUAL_RINGER_TOGGLE_COUNT_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Whether to play a sound for charging events.
           * @hide
           */
          public static final String CHARGING_SOUNDS_ENABLED = "charging_sounds_enabled";
  
          /**
           * Whether to vibrate for charging events.
           * @hide
           */
          public static final String CHARGING_VIBRATION_ENABLED = "charging_vibration_enabled";
  
          /**
           * If 0, turning on dnd manually will last indefinitely.
           * Else if non-negative, turning on dnd manually will last for this many minutes.
           * Else (if negative), turning on dnd manually will surface a dialog that prompts
           * user to specify a duration.
           * @hide
           */
          public static final String ZEN_DURATION = "zen_duration";
  
          private static final Validator ZEN_DURATION_VALIDATOR = ANY_INTEGER_VALIDATOR;
  
          /** @hide */ public static final int ZEN_DURATION_PROMPT = -1;
          /** @hide */ public static final int ZEN_DURATION_FOREVER = 0;
  
          /**
           * If nonzero, will show the zen upgrade notification when the user toggles DND on/off.
           * @hide
           */
          public static final String SHOW_ZEN_UPGRADE_NOTIFICATION = "show_zen_upgrade_notification";
  
          /**
           * If nonzero, will show the zen update settings suggestion.
           * @hide
           */
          public static final String SHOW_ZEN_SETTINGS_SUGGESTION = "show_zen_settings_suggestion";
  
          /**
           * If nonzero, zen has not been updated to reflect new changes.
           * @hide
           */
          public static final String ZEN_SETTINGS_UPDATED = "zen_settings_updated";
  
          /**
           * If nonzero, zen setting suggestion has been viewed by user
           * @hide
           */
          public static final String ZEN_SETTINGS_SUGGESTION_VIEWED =
                  "zen_settings_suggestion_viewed";
  
          /**
           * Whether the in call notification is enabled to play sound during calls.  The value is
           * boolean (1 or 0).
           * @hide
           */
          public static final String IN_CALL_NOTIFICATION_ENABLED = "in_call_notification_enabled";
  
          private static final Validator IN_CALL_NOTIFICATION_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Uri of the slice that's presented on the keyguard.
           * Defaults to a slice with the date and next alarm.
           *
           * @hide
           */
          public static final String KEYGUARD_SLICE_URI = "keyguard_slice_uri";
  
          /**
           * Whether to speak passwords while in accessibility mode.
           *
           * @deprecated The speaking of passwords is controlled by individual accessibility services.
           * Apps should ignore this setting and provide complete information to accessibility
           * at all times, which was the behavior when this value was {@code true}.
           */
          @Deprecated
          public static final String ACCESSIBILITY_SPEAK_PASSWORD = "speak_password";
  
          /**
           * Whether to draw text with high contrast while in accessibility mode.
           *
           * @hide
           */
          public static final String ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED =
                  "high_text_contrast_enabled";
  
          private static final Validator ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Setting that specifies whether the display magnification is enabled via a system-wide
           * triple tap gesture. Display magnifications allows the user to zoom in the display content
           * and is targeted to low vision users. The current magnification scale is controlled by
           * {@link #ACCESSIBILITY_DISPLAY_MAGNIFICATION_SCALE}.
           *
           * @hide
           */
          @TestApi
          public static final String ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED =
                  "accessibility_display_magnification_enabled";
  
          private static final Validator ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Setting that specifies whether the display magnification is enabled via a shortcut
           * affordance within the system's navigation area. Display magnifications allows the user to
           * zoom in the display content and is targeted to low vision users. The current
           * magnification scale is controlled by {@link #ACCESSIBILITY_DISPLAY_MAGNIFICATION_SCALE}.
           *
           * @hide
           */
          @SystemApi
          public static final String ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED =
                  "accessibility_display_magnification_navbar_enabled";
  
          private static final Validator ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED_VALIDATOR
                  = BOOLEAN_VALIDATOR;
  
          /**
           * Setting that specifies what the display magnification scale is.
           * Display magnifications allows the user to zoom in the display
           * content and is targeted to low vision users. Whether a display
           * magnification is performed is controlled by
           * {@link #ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED} and
           * {@link #ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED}
           *
           * @hide
           */
          public static final String ACCESSIBILITY_DISPLAY_MAGNIFICATION_SCALE =
                  "accessibility_display_magnification_scale";
  
          private static final Validator ACCESSIBILITY_DISPLAY_MAGNIFICATION_SCALE_VALIDATOR =
                  new SettingsValidators.InclusiveFloatRangeValidator(1.0f, Float.MAX_VALUE);
  
          /**
           * Unused mangnification setting
           *
           * @hide
           * @deprecated
           */
          @Deprecated
          public static final String ACCESSIBILITY_DISPLAY_MAGNIFICATION_AUTO_UPDATE =
                  "accessibility_display_magnification_auto_update";
  
          /**
           * Setting that specifies what mode the soft keyboard is in (default or hidden). Can be
           * modified from an AccessibilityService using the SoftKeyboardController.
           *
           * @hide
           */
          public static final String ACCESSIBILITY_SOFT_KEYBOARD_MODE =
                  "accessibility_soft_keyboard_mode";
  
          /**
           * Default soft keyboard behavior.
           *
           * @hide
           */
          public static final int SHOW_MODE_AUTO = 0;
  
          /**
           * Soft keyboard is never shown.
           *
           * @hide
           */
          public static final int SHOW_MODE_HIDDEN = 1;
  
          /**
           * Setting that specifies whether timed text (captions) should be
           * displayed in video content. Text display properties are controlled by
           * the following settings:
           * <ul>
           * <li>{@link #ACCESSIBILITY_CAPTIONING_LOCALE}
           * <li>{@link #ACCESSIBILITY_CAPTIONING_BACKGROUND_COLOR}
           * <li>{@link #ACCESSIBILITY_CAPTIONING_FOREGROUND_COLOR}
           * <li>{@link #ACCESSIBILITY_CAPTIONING_EDGE_COLOR}
           * <li>{@link #ACCESSIBILITY_CAPTIONING_EDGE_TYPE}
           * <li>{@link #ACCESSIBILITY_CAPTIONING_TYPEFACE}
           * <li>{@link #ACCESSIBILITY_CAPTIONING_FONT_SCALE}
           * </ul>
           *
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_ENABLED =
                  "accessibility_captioning_enabled";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Setting that specifies the language for captions as a locale string,
           * e.g. en_US.
           *
           * @see java.util.Locale#toString
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_LOCALE =
                  "accessibility_captioning_locale";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_LOCALE_VALIDATOR = LOCALE_VALIDATOR;
  
          /**
           * Integer property that specifies the preset style for captions, one
           * of:
           * <ul>
           * <li>{@link android.view.accessibility.CaptioningManager.CaptionStyle#PRESET_CUSTOM}
           * <li>a valid index of {@link android.view.accessibility.CaptioningManager.CaptionStyle#PRESETS}
           * </ul>
           *
           * @see java.util.Locale#toString
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_PRESET =
                  "accessibility_captioning_preset";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_PRESET_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[]{"-1", "0", "1", "2",
                          "3", "4"});
  
          /**
           * Integer property that specifes the background color for captions as a
           * packed 32-bit color.
           *
           * @see android.graphics.Color#argb
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_BACKGROUND_COLOR =
                  "accessibility_captioning_background_color";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_BACKGROUND_COLOR_VALIDATOR =
                  ANY_INTEGER_VALIDATOR;
  
          /**
           * Integer property that specifes the foreground color for captions as a
           * packed 32-bit color.
           *
           * @see android.graphics.Color#argb
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_FOREGROUND_COLOR =
                  "accessibility_captioning_foreground_color";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_FOREGROUND_COLOR_VALIDATOR =
                  ANY_INTEGER_VALIDATOR;
  
          /**
           * Integer property that specifes the edge type for captions, one of:
           * <ul>
           * <li>{@link android.view.accessibility.CaptioningManager.CaptionStyle#EDGE_TYPE_NONE}
           * <li>{@link android.view.accessibility.CaptioningManager.CaptionStyle#EDGE_TYPE_OUTLINE}
           * <li>{@link android.view.accessibility.CaptioningManager.CaptionStyle#EDGE_TYPE_DROP_SHADOW}
           * </ul>
           *
           * @see #ACCESSIBILITY_CAPTIONING_EDGE_COLOR
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_EDGE_TYPE =
                  "accessibility_captioning_edge_type";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_EDGE_TYPE_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[]{"0", "1", "2"});
  
          /**
           * Integer property that specifes the edge color for captions as a
           * packed 32-bit color.
           *
           * @see #ACCESSIBILITY_CAPTIONING_EDGE_TYPE
           * @see android.graphics.Color#argb
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_EDGE_COLOR =
                  "accessibility_captioning_edge_color";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_EDGE_COLOR_VALIDATOR =
                  ANY_INTEGER_VALIDATOR;
  
          /**
           * Integer property that specifes the window color for captions as a
           * packed 32-bit color.
           *
           * @see android.graphics.Color#argb
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_WINDOW_COLOR =
                  "accessibility_captioning_window_color";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_WINDOW_COLOR_VALIDATOR =
                  ANY_INTEGER_VALIDATOR;
  
          /**
           * String property that specifies the typeface for captions, one of:
           * <ul>
           * <li>DEFAULT
           * <li>MONOSPACE
           * <li>SANS_SERIF
           * <li>SERIF
           * </ul>
           *
           * @see android.graphics.Typeface
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ACCESSIBILITY_CAPTIONING_TYPEFACE =
                  "accessibility_captioning_typeface";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_TYPEFACE_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[]{"DEFAULT",
                          "MONOSPACE", "SANS_SERIF", "SERIF"});
  
          /**
           * Floating point property that specifies font scaling for captions.
           *
           * @hide
           */
          public static final String ACCESSIBILITY_CAPTIONING_FONT_SCALE =
                  "accessibility_captioning_font_scale";
  
          private static final Validator ACCESSIBILITY_CAPTIONING_FONT_SCALE_VALIDATOR =
                  new SettingsValidators.InclusiveFloatRangeValidator(0.5f, 2.0f);
  
          /**
           * Setting that specifies whether display color inversion is enabled.
           */
          public static final String ACCESSIBILITY_DISPLAY_INVERSION_ENABLED =
                  "accessibility_display_inversion_enabled";
  
          private static final Validator ACCESSIBILITY_DISPLAY_INVERSION_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Setting that specifies whether display color space adjustment is
           * enabled.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED =
                  "accessibility_display_daltonizer_enabled";
  
          private static final Validator ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Integer property that specifies the type of color space adjustment to
           * perform. Valid values are defined in AccessibilityManager and Settings arrays.xml:
           * - AccessibilityManager.DALTONIZER_DISABLED = -1
           * - AccessibilityManager.DALTONIZER_SIMULATE_MONOCHROMACY = 0
           * - <item>@string/daltonizer_mode_protanomaly</item> = 11
           * - AccessibilityManager.DALTONIZER_CORRECT_DEUTERANOMALY and
           *       <item>@string/daltonizer_mode_deuteranomaly</item> = 12
           * - <item>@string/daltonizer_mode_tritanomaly</item> = 13
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ACCESSIBILITY_DISPLAY_DALTONIZER =
                  "accessibility_display_daltonizer";
  
          private static final Validator ACCESSIBILITY_DISPLAY_DALTONIZER_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(
                          new String[] {"-1", "0", "11", "12", "13"});
  
          /**
           * Setting that specifies whether automatic click when the mouse pointer stops moving is
           * enabled.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ACCESSIBILITY_AUTOCLICK_ENABLED =
                  "accessibility_autoclick_enabled";
  
          private static final Validator ACCESSIBILITY_AUTOCLICK_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Integer setting specifying amount of time in ms the mouse pointer has to stay still
           * before performing click when {@link #ACCESSIBILITY_AUTOCLICK_ENABLED} is set.
           *
           * @see #ACCESSIBILITY_AUTOCLICK_ENABLED
           * @hide
           */
          public static final String ACCESSIBILITY_AUTOCLICK_DELAY =
                  "accessibility_autoclick_delay";
  
          private static final Validator ACCESSIBILITY_AUTOCLICK_DELAY_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Whether or not larger size icons are used for the pointer of mouse/trackpad for
           * accessibility.
           * (0 = false, 1 = true)
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ACCESSIBILITY_LARGE_POINTER_ICON =
                  "accessibility_large_pointer_icon";
  
          private static final Validator ACCESSIBILITY_LARGE_POINTER_ICON_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * The timeout for considering a press to be a long press in milliseconds.
           * @hide
           */
          @UnsupportedAppUsage
          public static final String LONG_PRESS_TIMEOUT = "long_press_timeout";
  
          private static final Validator LONG_PRESS_TIMEOUT_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * The duration in milliseconds between the first tap's up event and the second tap's
           * down event for an interaction to be considered part of the same multi-press.
           * @hide
           */
          public static final String MULTI_PRESS_TIMEOUT = "multi_press_timeout";
  
          /**
           * Setting that specifies recommended timeout in milliseconds for controls
           * which don't need user's interactions.
           *
           * @hide
           */
          public static final String ACCESSIBILITY_NON_INTERACTIVE_UI_TIMEOUT_MS =
                  "accessibility_non_interactive_ui_timeout_ms";
  
          /**
           * Setting that specifies recommended timeout in milliseconds for controls
           * which need user's interactions.
           *
           * @hide
           */
          public static final String ACCESSIBILITY_INTERACTIVE_UI_TIMEOUT_MS =
                  "accessibility_interactive_ui_timeout_ms";
  
          /**
           * List of the enabled print services.
           *
           * N and beyond uses {@link #DISABLED_PRINT_SERVICES}. But this might be used in an upgrade
           * from pre-N.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ENABLED_PRINT_SERVICES =
              "enabled_print_services";
  
          /**
           * List of the disabled print services.
           *
           * @hide
           */
          @TestApi
          public static final String DISABLED_PRINT_SERVICES =
              "disabled_print_services";
  
          /**
           * The saved value for WindowManagerService.setForcedDisplayDensity()
           * formatted as a single integer representing DPI. If unset, then use
           * the real display density.
           *
           * @hide
           */
          public static final String DISPLAY_DENSITY_FORCED = "display_density_forced";
  
          /**
           * Setting to always use the default text-to-speech settings regardless
           * of the application settings.
           * 1 = override application settings,
           * 0 = use application settings (if specified).
           *
           * @deprecated  The value of this setting is no longer respected by
           * the framework text to speech APIs as of the Ice Cream Sandwich release.
           */
          @Deprecated
          public static final String TTS_USE_DEFAULTS = "tts_use_defaults";
  
          /**
           * Default text-to-speech engine speech rate. 100 = 1x
           */
          public static final String TTS_DEFAULT_RATE = "tts_default_rate";
  
          private static final Validator TTS_DEFAULT_RATE_VALIDATOR = NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Default text-to-speech engine pitch. 100 = 1x
           */
          public static final String TTS_DEFAULT_PITCH = "tts_default_pitch";
  
          private static final Validator TTS_DEFAULT_PITCH_VALIDATOR = NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Default text-to-speech engine.
           */
          public static final String TTS_DEFAULT_SYNTH = "tts_default_synth";
  
          private static final Validator TTS_DEFAULT_SYNTH_VALIDATOR = PACKAGE_NAME_VALIDATOR;
  
          /**
           * Default text-to-speech language.
           *
           * @deprecated this setting is no longer in use, as of the Ice Cream
           * Sandwich release. Apps should never need to read this setting directly,
           * instead can query the TextToSpeech framework classes for the default
           * locale. {@link TextToSpeech#getLanguage()}.
           */
          @Deprecated
          public static final String TTS_DEFAULT_LANG = "tts_default_lang";
  
          /**
           * Default text-to-speech country.
           *
           * @deprecated this setting is no longer in use, as of the Ice Cream
           * Sandwich release. Apps should never need to read this setting directly,
           * instead can query the TextToSpeech framework classes for the default
           * locale. {@link TextToSpeech#getLanguage()}.
           */
          @Deprecated
          public static final String TTS_DEFAULT_COUNTRY = "tts_default_country";
  
          /**
           * Default text-to-speech locale variant.
           *
           * @deprecated this setting is no longer in use, as of the Ice Cream
           * Sandwich release. Apps should never need to read this setting directly,
           * instead can query the TextToSpeech framework classes for the
           * locale that is in use {@link TextToSpeech#getLanguage()}.
           */
          @Deprecated
          public static final String TTS_DEFAULT_VARIANT = "tts_default_variant";
  
          /**
           * Stores the default tts locales on a per engine basis. Stored as
           * a comma seperated list of values, each value being of the form
           * {@code engine_name:locale} for example,
           * {@code com.foo.ttsengine:eng-USA,com.bar.ttsengine:esp-ESP}. This
           * supersedes {@link #TTS_DEFAULT_LANG}, {@link #TTS_DEFAULT_COUNTRY} and
           * {@link #TTS_DEFAULT_VARIANT}. Apps should never need to read this
           * setting directly, and can query the TextToSpeech framework classes
           * for the locale that is in use.
           *
           * @hide
           */
          public static final String TTS_DEFAULT_LOCALE = "tts_default_locale";
  
          private static final Validator TTS_DEFAULT_LOCALE_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  if (value == null || value.length() == 0) {
                      return false;
                  }
                  String[] ttsLocales = value.split(",");
                  boolean valid = true;
                  for (String ttsLocale : ttsLocales) {
                      String[] parts = ttsLocale.split(":");
                      valid |= ((parts.length == 2)
                              && (parts[0].length() > 0)
                              && ANY_STRING_VALIDATOR.validate(parts[0])
                              && LOCALE_VALIDATOR.validate(parts[1]));
                  }
                  return valid;
              }
          };
  
          /**
           * Space delimited list of plugin packages that are enabled.
           */
          public static final String TTS_ENABLED_PLUGINS = "tts_enabled_plugins";
  
          private static final Validator TTS_ENABLED_PLUGINS_VALIDATOR =
                  new SettingsValidators.PackageNameListValidator(" ");
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON}
           * instead.
           */
          @Deprecated
          public static final String WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON =
                  Global.WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON;
  
          private static final Validator WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY}
           * instead.
           */
          @Deprecated
          public static final String WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY =
                  Global.WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY;
  
          private static final Validator WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_NUM_OPEN_NETWORKS_KEPT}
           * instead.
           */
          @Deprecated
          public static final String WIFI_NUM_OPEN_NETWORKS_KEPT =
                  Global.WIFI_NUM_OPEN_NETWORKS_KEPT;
  
          private static final Validator WIFI_NUM_OPEN_NETWORKS_KEPT_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_ON}
           * instead.
           */
          @Deprecated
          public static final String WIFI_ON = Global.WIFI_ON;
  
          /**
           * The acceptable packet loss percentage (range 0 - 100) before trying
           * another AP on the same network.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_ACCEPTABLE_PACKET_LOSS_PERCENTAGE =
                  "wifi_watchdog_acceptable_packet_loss_percentage";
  
          /**
           * The number of access points required for a network in order for the
           * watchdog to monitor it.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_AP_COUNT = "wifi_watchdog_ap_count";
  
          /**
           * The delay between background checks.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_BACKGROUND_CHECK_DELAY_MS =
                  "wifi_watchdog_background_check_delay_ms";
  
          /**
           * Whether the Wi-Fi watchdog is enabled for background checking even
           * after it thinks the user has connected to a good access point.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_BACKGROUND_CHECK_ENABLED =
                  "wifi_watchdog_background_check_enabled";
  
          /**
           * The timeout for a background ping
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_BACKGROUND_CHECK_TIMEOUT_MS =
                  "wifi_watchdog_background_check_timeout_ms";
  
          /**
           * The number of initial pings to perform that *may* be ignored if they
           * fail. Again, if these fail, they will *not* be used in packet loss
           * calculation. For example, one network always seemed to time out for
           * the first couple pings, so this is set to 3 by default.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_INITIAL_IGNORED_PING_COUNT =
              "wifi_watchdog_initial_ignored_ping_count";
  
          /**
           * The maximum number of access points (per network) to attempt to test.
           * If this number is reached, the watchdog will no longer monitor the
           * initial connection state for the network. This is a safeguard for
           * networks containing multiple APs whose DNS does not respond to pings.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_MAX_AP_CHECKS = "wifi_watchdog_max_ap_checks";
  
          /**
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_WATCHDOG_ON} instead
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_ON = "wifi_watchdog_on";
  
          /**
           * A comma-separated list of SSIDs for which the Wi-Fi watchdog should be enabled.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_WATCH_LIST = "wifi_watchdog_watch_list";
  
          /**
           * The number of pings to test if an access point is a good connection.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_PING_COUNT = "wifi_watchdog_ping_count";
  
          /**
           * The delay between pings.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_PING_DELAY_MS = "wifi_watchdog_ping_delay_ms";
  
          /**
           * The timeout per ping.
           * @deprecated This setting is not used.
           */
          @Deprecated
          public static final String WIFI_WATCHDOG_PING_TIMEOUT_MS = "wifi_watchdog_ping_timeout_ms";
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Global#WIFI_MAX_DHCP_RETRY_COUNT} instead
           */
          @Deprecated
          public static final String WIFI_MAX_DHCP_RETRY_COUNT = Global.WIFI_MAX_DHCP_RETRY_COUNT;
  
          /**
           * @deprecated Use
           * {@link android.provider.Settings.Global#WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS} instead
           */
          @Deprecated
          public static final String WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS =
                  Global.WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS;
  
          /**
           * The number of milliseconds to hold on to a PendingIntent based request. This delay gives
           * the receivers of the PendingIntent an opportunity to make a new network request before
           * the Network satisfying the request is potentially removed.
           *
           * @hide
           */
          public static final String CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS =
                  "connectivity_release_pending_intent_delay_ms";
  
          /**
           * Whether background data usage is allowed.
           *
           * @deprecated As of {@link VERSION_CODES#ICE_CREAM_SANDWICH},
           *             availability of background data depends on several
           *             combined factors. When background data is unavailable,
           *             {@link ConnectivityManager#getActiveNetworkInfo()} will
           *             now appear disconnected.
           */
          @Deprecated
          public static final String BACKGROUND_DATA = "background_data";
  
          /**
           * Origins for which browsers should allow geolocation by default.
           * The value is a space-separated list of origins.
           */
          public static final String ALLOWED_GEOLOCATION_ORIGINS
                  = "allowed_geolocation_origins";
  
          /**
           * The preferred TTY mode     0 = TTy Off, CDMA default
           *                            1 = TTY Full
           *                            2 = TTY HCO
           *                            3 = TTY VCO
           * @hide
           */
          public static final String PREFERRED_TTY_MODE =
                  "preferred_tty_mode";
  
          private static final Validator PREFERRED_TTY_MODE_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[]{"0", "1", "2", "3"});
  
          /**
           * Whether the enhanced voice privacy mode is enabled.
           * 0 = normal voice privacy
           * 1 = enhanced voice privacy
           * @hide
           */
          public static final String ENHANCED_VOICE_PRIVACY_ENABLED = "enhanced_voice_privacy_enabled";
  
          private static final Validator ENHANCED_VOICE_PRIVACY_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the TTY mode mode is enabled.
           * 0 = disabled
           * 1 = enabled
           * @hide
           */
          public static final String TTY_MODE_ENABLED = "tty_mode_enabled";
  
          private static final Validator TTY_MODE_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * User-selected RTT mode. When on, outgoing and incoming calls will be answered as RTT
           * calls when supported by the device and carrier. Boolean value.
           * 0 = OFF
           * 1 = ON
           */
          public static final String RTT_CALLING_MODE = "rtt_calling_mode";
  
          private static final Validator RTT_CALLING_MODE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
          /**
           * Controls whether settings backup is enabled.
           * Type: int ( 0 = disabled, 1 = enabled )
           * @hide
           */
          @UnsupportedAppUsage
          public static final String BACKUP_ENABLED = "backup_enabled";
  
          /**
           * Controls whether application data is automatically restored from backup
           * at install time.
           * Type: int ( 0 = disabled, 1 = enabled )
           * @hide
           */
          @UnsupportedAppUsage
          public static final String BACKUP_AUTO_RESTORE = "backup_auto_restore";
  
          /**
           * Indicates whether settings backup has been fully provisioned.
           * Type: int ( 0 = unprovisioned, 1 = fully provisioned )
           * @hide
           */
          @UnsupportedAppUsage
          public static final String BACKUP_PROVISIONED = "backup_provisioned";
  
          /**
           * Component of the transport to use for backup/restore.
           * @hide
           */
          @UnsupportedAppUsage
          public static final String BACKUP_TRANSPORT = "backup_transport";
  
          /**
           * Indicates the version for which the setup wizard was last shown. The version gets
           * bumped for each release when there is new setup information to show.
           *
           * @hide
           */
          @SystemApi
          public static final String LAST_SETUP_SHOWN = "last_setup_shown";
  
          /**
           * The interval in milliseconds after which Wi-Fi is considered idle.
           * When idle, it is possible for the device to be switched from Wi-Fi to
           * the mobile data network.
           * @hide
           * @deprecated Use {@link android.provider.Settings.Global#WIFI_IDLE_MS}
           * instead.
           */
          @Deprecated
          public static final String WIFI_IDLE_MS = Global.WIFI_IDLE_MS;
  
          /**
           * The global search provider chosen by the user (if multiple global
           * search providers are installed). This will be the provider returned
           * by {@link SearchManager#getGlobalSearchActivity()} if it's still
           * installed. This setting is stored as a flattened component name as
           * per {@link ComponentName#flattenToString()}.
           *
           * @hide
           */
          public static final String SEARCH_GLOBAL_SEARCH_ACTIVITY =
                  "search_global_search_activity";
  
          /**
           * The number of promoted sources in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_NUM_PROMOTED_SOURCES = "search_num_promoted_sources";
          /**
           * The maximum number of suggestions returned by GlobalSearch.
           * @hide
           */
          public static final String SEARCH_MAX_RESULTS_TO_DISPLAY = "search_max_results_to_display";
          /**
           * The number of suggestions GlobalSearch will ask each non-web search source for.
           * @hide
           */
          public static final String SEARCH_MAX_RESULTS_PER_SOURCE = "search_max_results_per_source";
          /**
           * The number of suggestions the GlobalSearch will ask the web search source for.
           * @hide
           */
          public static final String SEARCH_WEB_RESULTS_OVERRIDE_LIMIT =
                  "search_web_results_override_limit";
          /**
           * The number of milliseconds that GlobalSearch will wait for suggestions from
           * promoted sources before continuing with all other sources.
           * @hide
           */
          public static final String SEARCH_PROMOTED_SOURCE_DEADLINE_MILLIS =
                  "search_promoted_source_deadline_millis";
          /**
           * The number of milliseconds before GlobalSearch aborts search suggesiton queries.
           * @hide
           */
          public static final String SEARCH_SOURCE_TIMEOUT_MILLIS = "search_source_timeout_millis";
          /**
           * The maximum number of milliseconds that GlobalSearch shows the previous results
           * after receiving a new query.
           * @hide
           */
          public static final String SEARCH_PREFILL_MILLIS = "search_prefill_millis";
          /**
           * The maximum age of log data used for shortcuts in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_MAX_STAT_AGE_MILLIS = "search_max_stat_age_millis";
          /**
           * The maximum age of log data used for source ranking in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_MAX_SOURCE_EVENT_AGE_MILLIS =
                  "search_max_source_event_age_millis";
          /**
           * The minimum number of impressions needed to rank a source in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_MIN_IMPRESSIONS_FOR_SOURCE_RANKING =
                  "search_min_impressions_for_source_ranking";
          /**
           * The minimum number of clicks needed to rank a source in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_MIN_CLICKS_FOR_SOURCE_RANKING =
                  "search_min_clicks_for_source_ranking";
          /**
           * The maximum number of shortcuts shown by GlobalSearch.
           * @hide
           */
          public static final String SEARCH_MAX_SHORTCUTS_RETURNED = "search_max_shortcuts_returned";
          /**
           * The size of the core thread pool for suggestion queries in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_QUERY_THREAD_CORE_POOL_SIZE =
                  "search_query_thread_core_pool_size";
          /**
           * The maximum size of the thread pool for suggestion queries in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_QUERY_THREAD_MAX_POOL_SIZE =
                  "search_query_thread_max_pool_size";
          /**
           * The size of the core thread pool for shortcut refreshing in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_SHORTCUT_REFRESH_CORE_POOL_SIZE =
                  "search_shortcut_refresh_core_pool_size";
          /**
           * The maximum size of the thread pool for shortcut refreshing in GlobalSearch.
           * @hide
           */
          public static final String SEARCH_SHORTCUT_REFRESH_MAX_POOL_SIZE =
                  "search_shortcut_refresh_max_pool_size";
          /**
           * The maximun time that excess threads in the GlobalSeach thread pools will
           * wait before terminating.
           * @hide
           */
          public static final String SEARCH_THREAD_KEEPALIVE_SECONDS =
                  "search_thread_keepalive_seconds";
          /**
           * The maximum number of concurrent suggestion queries to each source.
           * @hide
           */
          public static final String SEARCH_PER_SOURCE_CONCURRENT_QUERY_LIMIT =
                  "search_per_source_concurrent_query_limit";
  
          /**
           * Whether or not alert sounds are played on StorageManagerService events.
           * (0 = false, 1 = true)
           * @hide
           */
          public static final String MOUNT_PLAY_NOTIFICATION_SND = "mount_play_not_snd";
  
          private static final Validator MOUNT_PLAY_NOTIFICATION_SND_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not UMS auto-starts on UMS host detection. (0 = false, 1 = true)
           * @hide
           */
          public static final String MOUNT_UMS_AUTOSTART = "mount_ums_autostart";
  
          private static final Validator MOUNT_UMS_AUTOSTART_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not a notification is displayed on UMS host detection. (0 = false, 1 = true)
           * @hide
           */
          public static final String MOUNT_UMS_PROMPT = "mount_ums_prompt";
  
          private static final Validator MOUNT_UMS_PROMPT_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not a notification is displayed while UMS is enabled. (0 = false, 1 = true)
           * @hide
           */
          public static final String MOUNT_UMS_NOTIFY_ENABLED = "mount_ums_notify_enabled";
  
          private static final Validator MOUNT_UMS_NOTIFY_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * If nonzero, ANRs in invisible background processes bring up a dialog.
           * Otherwise, the process will be silently killed.
           *
           * Also prevents ANRs and crash dialogs from being suppressed.
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ANR_SHOW_BACKGROUND = "anr_show_background";
  
          /**
           * If nonzero, crashes in foreground processes will bring up a dialog.
           * Otherwise, the process will be silently killed.
           * @hide
           */
          public static final String SHOW_FIRST_CRASH_DIALOG_DEV_OPTION =
                  "show_first_crash_dialog_dev_option";
  
          private static final Validator SHOW_FIRST_CRASH_DIALOG_DEV_OPTION_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * The {@link ComponentName} string of the service to be used as the voice recognition
           * service.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String VOICE_RECOGNITION_SERVICE = "voice_recognition_service";
  
          /**
           * Stores whether an user has consented to have apps verified through PAM.
           * The value is boolean (1 or 0).
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String PACKAGE_VERIFIER_USER_CONSENT =
              "package_verifier_user_consent";
  
          /**
           * The {@link ComponentName} string of the selected spell checker service which is
           * one of the services managed by the text service manager.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String SELECTED_SPELL_CHECKER = "selected_spell_checker";
  
          /**
           * {@link android.view.textservice.SpellCheckerSubtype#hashCode()} of the selected subtype
           * of the selected spell checker service which is one of the services managed by the text
           * service manager.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String SELECTED_SPELL_CHECKER_SUBTYPE =
                  "selected_spell_checker_subtype";
  
          /**
           * Whether spell checker is enabled or not.
           *
           * @hide
           */
          public static final String SPELL_CHECKER_ENABLED = "spell_checker_enabled";
  
          /**
           * What happens when the user presses the Power button while in-call
           * and the screen is on.<br/>
           * <b>Values:</b><br/>
           * 1 - The Power button turns off the screen and locks the device. (Default behavior)<br/>
           * 2 - The Power button hangs up the current call.<br/>
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String INCALL_POWER_BUTTON_BEHAVIOR = "incall_power_button_behavior";
  
          private static final Validator INCALL_POWER_BUTTON_BEHAVIOR_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[]{"1", "2"});
  
          /**
           * INCALL_POWER_BUTTON_BEHAVIOR value for "turn off screen".
           * @hide
           */
          public static final int INCALL_POWER_BUTTON_BEHAVIOR_SCREEN_OFF = 0x1;
  
          /**
           * INCALL_POWER_BUTTON_BEHAVIOR value for "hang up".
           * @hide
           */
          public static final int INCALL_POWER_BUTTON_BEHAVIOR_HANGUP = 0x2;
  
          /**
           * INCALL_POWER_BUTTON_BEHAVIOR default value.
           * @hide
           */
          public static final int INCALL_POWER_BUTTON_BEHAVIOR_DEFAULT =
                  INCALL_POWER_BUTTON_BEHAVIOR_SCREEN_OFF;
  
          /**
           * What happens when the user presses the Back button while in-call
           * and the screen is on.<br/>
           * <b>Values:</b><br/>
           * 0 - The Back buttons does nothing different.<br/>
           * 1 - The Back button hangs up the current call.<br/>
           *
           * @hide
           */
          public static final String INCALL_BACK_BUTTON_BEHAVIOR = "incall_back_button_behavior";
  
          /**
           * INCALL_BACK_BUTTON_BEHAVIOR value for no action.
           * @hide
           */
          public static final int INCALL_BACK_BUTTON_BEHAVIOR_NONE = 0x0;
  
          /**
           * INCALL_BACK_BUTTON_BEHAVIOR value for "hang up".
           * @hide
           */
          public static final int INCALL_BACK_BUTTON_BEHAVIOR_HANGUP = 0x1;
  
          /**
           * INCALL_POWER_BUTTON_BEHAVIOR default value.
           * @hide
           */
          public static final int INCALL_BACK_BUTTON_BEHAVIOR_DEFAULT =
                  INCALL_BACK_BUTTON_BEHAVIOR_NONE;
  
          /**
           * Whether the device should wake when the wake gesture sensor detects motion.
           * @hide
           */
          public static final String WAKE_GESTURE_ENABLED = "wake_gesture_enabled";
  
          private static final Validator WAKE_GESTURE_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the device should doze if configured.
           * @hide
           */
          @UnsupportedAppUsage
          public static final String DOZE_ENABLED = "doze_enabled";
  
          private static final Validator DOZE_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Indicates whether doze should be always on.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String DOZE_ALWAYS_ON = "doze_always_on";
  
          private static final Validator DOZE_ALWAYS_ON_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the device should pulse on pick up gesture.
           * @hide
           */
          public static final String DOZE_PICK_UP_GESTURE = "doze_pulse_on_pick_up";
  
          private static final Validator DOZE_PICK_UP_GESTURE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the device should pulse on long press gesture.
           * @hide
           */
          public static final String DOZE_PULSE_ON_LONG_PRESS = "doze_pulse_on_long_press";
  
          /**
           * Whether the device should pulse on double tap gesture.
           * @hide
           */
          public static final String DOZE_DOUBLE_TAP_GESTURE = "doze_pulse_on_double_tap";
  
          private static final Validator DOZE_DOUBLE_TAP_GESTURE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the device should respond to the SLPI tap gesture.
           * @hide
           */
          public static final String DOZE_TAP_SCREEN_GESTURE = "doze_tap_gesture";
  
          private static final Validator DOZE_TAP_SCREEN_GESTURE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Gesture that wakes up the display, showing some version of the lock screen.
           * @hide
           */
          public static final String DOZE_WAKE_LOCK_SCREEN_GESTURE = "doze_wake_screen_gesture";
  
          private static final Validator DOZE_WAKE_LOCK_SCREEN_GESTURE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Gesture that wakes up the display, toggling between {@link Display.STATE_OFF} and
           * {@link Display.STATE_DOZE}.
           * @hide
           */
          public static final String DOZE_WAKE_DISPLAY_GESTURE = "doze_wake_display_gesture";
  
          private static final Validator DOZE_WAKE_DISPLAY_GESTURE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Gesture that skips media.
           * @hide
           */
          public static final String SKIP_GESTURE = "skip_gesture";
  
          private static final Validator SKIP_GESTURE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Count of successful gestures.
           * @hide
           */
          public static final String SKIP_GESTURE_COUNT = "skip_gesture_count";
  
          /**
           * Count of non-gesture interaction.
           * @hide
           */
          public static final String SKIP_TOUCH_COUNT = "skip_touch_count";
  
          private static final Validator SKIP_GESTURE_COUNT_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Direction to advance media for skip gesture
           * @hide
           */
          public static final String SKIP_DIRECTION = "skip_gesture_direction";
  
          /**
           * Only used if FeatureFlag "settings_skip_direction_mutable" is enabled.
           * If feature flag is disabled, should assume SKIP_DIRECTION = 0.
           *      0 / false = right to left to advance to next
           *      1 / true = left to right to advance to next
           */
          private static final Validator SKIP_DIRECTION_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Gesture that silences sound (alarms, notification, calls).
           * @hide
           */
          public static final String SILENCE_GESTURE = "silence_gesture";
  
          private static final Validator SILENCE_GESTURE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Count of successful silence alarms gestures.
           * @hide
           */
          public static final String SILENCE_ALARMS_GESTURE_COUNT = "silence_alarms_gesture_count";
  
          /**
           * Count of successful silence timer gestures.
           * @hide
           */
          public static final String SILENCE_TIMER_GESTURE_COUNT = "silence_timer_gesture_count";
  
          /**
           * Count of successful silence call gestures.
           * @hide
           */
          public static final String SILENCE_CALL_GESTURE_COUNT = "silence_call_gesture_count";
  
          /**
           * Count of non-gesture interaction.
           * @hide
           */
          public static final String SILENCE_ALARMS_TOUCH_COUNT = "silence_alarms_touch_count";
  
          /**
           * Count of non-gesture interaction.
           * @hide
           */
          public static final String SILENCE_TIMER_TOUCH_COUNT = "silence_timer_touch_count";
  
          /**
           * Count of non-gesture interaction.
           * @hide
           */
          public static final String SILENCE_CALL_TOUCH_COUNT = "silence_call_touch_count";
  
          private static final Validator SILENCE_GESTURE_COUNT_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Number of successful "Motion Sense" tap gestures to pause media.
           * @hide
           */
          public static final String AWARE_TAP_PAUSE_GESTURE_COUNT = "aware_tap_pause_gesture_count";
  
          /**
           * Number of touch interactions to pause media when a "Motion Sense" gesture could
           * have been used.
           * @hide
           */
          public static final String AWARE_TAP_PAUSE_TOUCH_COUNT = "aware_tap_pause_touch_count";
  
          /**
           * The current night mode that has been selected by the user.  Owned
           * and controlled by UiModeManagerService.  Constants are as per
           * UiModeManager.
           * @hide
           */
          public static final String UI_NIGHT_MODE = "ui_night_mode";
  
          private static final Validator UI_NIGHT_MODE_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 2);
  
          /**
           * Whether screensavers are enabled.
           * @hide
           */
          public static final String SCREENSAVER_ENABLED = "screensaver_enabled";
  
          private static final Validator SCREENSAVER_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * The user's chosen screensaver components.
           *
           * These will be launched by the PhoneWindowManager after a timeout when not on
           * battery, or upon dock insertion (if SCREENSAVER_ACTIVATE_ON_DOCK is set to 1).
           * @hide
           */
          public static final String SCREENSAVER_COMPONENTS = "screensaver_components";
  
          private static final Validator SCREENSAVER_COMPONENTS_VALIDATOR =
                  new SettingsValidators.ComponentNameListValidator(",");
  
          /**
           * If screensavers are enabled, whether the screensaver should be automatically launched
           * when the device is inserted into a (desk) dock.
           * @hide
           */
          public static final String SCREENSAVER_ACTIVATE_ON_DOCK = "screensaver_activate_on_dock";
  
          private static final Validator SCREENSAVER_ACTIVATE_ON_DOCK_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * If screensavers are enabled, whether the screensaver should be automatically launched
           * when the screen times out when not on battery.
           * @hide
           */
          public static final String SCREENSAVER_ACTIVATE_ON_SLEEP = "screensaver_activate_on_sleep";
  
          private static final Validator SCREENSAVER_ACTIVATE_ON_SLEEP_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * If screensavers are enabled, the default screensaver component.
           * @hide
           */
          public static final String SCREENSAVER_DEFAULT_COMPONENT = "screensaver_default_component";
  
          /**
           * The default NFC payment component
           * @hide
           */
          @UnsupportedAppUsage
          public static final String NFC_PAYMENT_DEFAULT_COMPONENT = "nfc_payment_default_component";
  
          private static final Validator NFC_PAYMENT_DEFAULT_COMPONENT_VALIDATOR =
                  COMPONENT_NAME_VALIDATOR;
  
          /**
           * Whether NFC payment is handled by the foreground application or a default.
           * @hide
           */
          public static final String NFC_PAYMENT_FOREGROUND = "nfc_payment_foreground";
  
          /**
           * Specifies the package name currently configured to be the primary sms application
           * @hide
           */
          @UnsupportedAppUsage
          public static final String SMS_DEFAULT_APPLICATION = "sms_default_application";
  
          /**
           * Specifies the package name currently configured to be the default dialer application
           * @hide
           */
          @UnsupportedAppUsage
          public static final String DIALER_DEFAULT_APPLICATION = "dialer_default_application";
  
          /**
           * Specifies the component name currently configured to be the default call screening
           * application
           * @hide
           */
          public static final String CALL_SCREENING_DEFAULT_COMPONENT =
                  "call_screening_default_component";
  
          /**
           * Specifies the package name currently configured to be the emergency assistance application
           *
           * @see android.telephony.TelephonyManager#ACTION_EMERGENCY_ASSISTANCE
           *
           * @hide
           */
          public static final String EMERGENCY_ASSISTANCE_APPLICATION = "emergency_assistance_application";
  
          /**
           * Specifies whether the current app context on scren (assist data) will be sent to the
           * assist application (active voice interaction service).
           *
           * @hide
           */
          public static final String ASSIST_STRUCTURE_ENABLED = "assist_structure_enabled";
  
          /**
           * Specifies whether a screenshot of the screen contents will be sent to the assist
           * application (active voice interaction service).
           *
           * @hide
           */
          public static final String ASSIST_SCREENSHOT_ENABLED = "assist_screenshot_enabled";
  
          /**
           * Specifies whether the screen will show an animation if screen contents are sent to the
           * assist application (active voice interaction service).
           *
           * Note that the disclosure will be forced for third-party assistants or if the device
           * does not support disabling it.
           *
           * @hide
           */
          public static final String ASSIST_DISCLOSURE_ENABLED = "assist_disclosure_enabled";
  
          /**
           * Control if rotation suggestions are sent to System UI when in rotation locked mode.
           * Done to enable screen rotation while the the screen rotation is locked. Enabling will
           * poll the accelerometer in rotation locked mode.
           *
           * If 0, then rotation suggestions are not sent to System UI. If 1, suggestions are sent.
           *
           * @hide
           */
  
          public static final String SHOW_ROTATION_SUGGESTIONS = "show_rotation_suggestions";
  
          /**
           * The disabled state of SHOW_ROTATION_SUGGESTIONS.
           * @hide
           */
          public static final int SHOW_ROTATION_SUGGESTIONS_DISABLED = 0x0;
  
          /**
           * The enabled state of SHOW_ROTATION_SUGGESTIONS.
           * @hide
           */
          public static final int SHOW_ROTATION_SUGGESTIONS_ENABLED = 0x1;
  
          /**
           * The default state of SHOW_ROTATION_SUGGESTIONS.
           * @hide
           */
          public static final int SHOW_ROTATION_SUGGESTIONS_DEFAULT =
                  SHOW_ROTATION_SUGGESTIONS_ENABLED;
  
          /**
           * The number of accepted rotation suggestions. Used to determine if the user has been
           * introduced to rotation suggestions.
           * @hide
           */
          public static final String NUM_ROTATION_SUGGESTIONS_ACCEPTED =
                  "num_rotation_suggestions_accepted";
  
          /**
           * Read only list of the service components that the current user has explicitly allowed to
           * see and assist with all of the user's notifications.
           *
           * @deprecated Use
           * {@link NotificationManager#isNotificationAssistantAccessGranted(ComponentName)}.
           * @hide
           */
          @Deprecated
          public static final String ENABLED_NOTIFICATION_ASSISTANT =
                  "enabled_notification_assistant";
  
          private static final Validator ENABLED_NOTIFICATION_ASSISTANT_VALIDATOR =
                  new SettingsValidators.ComponentNameListValidator(":");
  
          /**
           * Read only list of the service components that the current user has explicitly allowed to
           * see all of the user's notifications, separated by ':'.
           *
           * @hide
           * @deprecated Use
           * {@link NotificationManager#isNotificationListenerAccessGranted(ComponentName)}.
           */
          @Deprecated
          @UnsupportedAppUsage
          public static final String ENABLED_NOTIFICATION_LISTENERS = "enabled_notification_listeners";
  
          private static final Validator ENABLED_NOTIFICATION_LISTENERS_VALIDATOR =
                  new SettingsValidators.ComponentNameListValidator(":");
  
          /**
           * Read only list of the packages that the current user has explicitly allowed to
           * manage do not disturb, separated by ':'.
           *
           * @deprecated Use {@link NotificationManager#isNotificationPolicyAccessGranted()}.
           * @hide
           */
          @Deprecated
          @TestApi
          public static final String ENABLED_NOTIFICATION_POLICY_ACCESS_PACKAGES =
                  "enabled_notification_policy_access_packages";
  
          private static final Validator ENABLED_NOTIFICATION_POLICY_ACCESS_PACKAGES_VALIDATOR =
                  new SettingsValidators.PackageNameListValidator(":");
  
          /**
           * Defines whether managed profile ringtones should be synced from it's parent profile
           * <p>
           * 0 = ringtones are not synced
           * 1 = ringtones are synced from the profile's parent (default)
           * <p>
           * This value is only used for managed profiles.
           * @hide
           */
          @TestApi
          @RequiresPermission(Manifest.permission.WRITE_SECURE_SETTINGS)
          public static final String SYNC_PARENT_SOUNDS = "sync_parent_sounds";
  
          private static final Validator SYNC_PARENT_SOUNDS_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /** @hide */
          @UnsupportedAppUsage
          public static final String IMMERSIVE_MODE_CONFIRMATIONS = "immersive_mode_confirmations";
  
          /**
           * This is the query URI for finding a print service to install.
           *
           * @hide
           */
          public static final String PRINT_SERVICE_SEARCH_URI = "print_service_search_uri";
  
          /**
           * This is the query URI for finding a NFC payment service to install.
           *
           * @hide
           */
          public static final String PAYMENT_SERVICE_SEARCH_URI = "payment_service_search_uri";
  
          /**
           * This is the query URI for finding a auto fill service to install.
           *
           * @hide
           */
          public static final String AUTOFILL_SERVICE_SEARCH_URI = "autofill_service_search_uri";
  
          /**
           * If enabled, apps should try to skip any introductory hints on first launch. This might
           * apply to users that are already familiar with the environment or temporary users.
           * <p>
           * Type : int (0 to show hints, 1 to skip showing hints)
           */
          public static final String SKIP_FIRST_USE_HINTS = "skip_first_use_hints";
  
          /**
           * Persisted playback time after a user confirmation of an unsafe volume level.
           *
           * @hide
           */
          public static final String UNSAFE_VOLUME_MUSIC_ACTIVE_MS = "unsafe_volume_music_active_ms";
  
          /**
           * Indicates whether notification display on the lock screen is enabled.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          public static final String LOCK_SCREEN_SHOW_NOTIFICATIONS =
                  "lock_screen_show_notifications";
  
          /**
           * Indicates whether the lock screen should display silent notifications.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          public static final String LOCK_SCREEN_SHOW_SILENT_NOTIFICATIONS =
                  "lock_screen_show_silent_notifications";
  
          /**
           * Indicates whether snooze options should be shown on notifications
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          public static final String SHOW_NOTIFICATION_SNOOZE = "show_notification_snooze";
  
          /**
           * List of TV inputs that are currently hidden. This is a string
           * containing the IDs of all hidden TV inputs. Each ID is encoded by
           * {@link android.net.Uri#encode(String)} and separated by ':'.
           * @hide
           */
          public static final String TV_INPUT_HIDDEN_INPUTS = "tv_input_hidden_inputs";
  
          /**
           * List of custom TV input labels. This is a string containing <TV input id, custom name>
           * pairs. TV input id and custom name are encoded by {@link android.net.Uri#encode(String)}
           * and separated by ','. Each pair is separated by ':'.
           * @hide
           */
          public static final String TV_INPUT_CUSTOM_LABELS = "tv_input_custom_labels";
  
          /**
           * Whether TV app uses non-system inputs.
           *
           * <p>
           * The value is boolean (1 or 0), where 1 means non-system TV inputs are allowed,
           * and 0 means non-system TV inputs are not allowed.
           *
           * <p>
           * Devices such as sound bars may have changed the system property allow_third_party_inputs
           * to false so the TV Application only uses HDMI and other built in inputs. This setting
           * allows user to override the default and have the TV Application use third party TV inputs
           * available on play store.
           *
           * @hide
           */
          public static final String TV_APP_USES_NON_SYSTEM_INPUTS = "tv_app_uses_non_system_inputs";
  
          /**
           * Whether automatic routing of system audio to USB audio peripheral is disabled.
           * The value is boolean (1 or 0), where 1 means automatic routing is disabled,
           * and 0 means automatic routing is enabled.
           *
           * @hide
           */
          public static final String USB_AUDIO_AUTOMATIC_ROUTING_DISABLED =
                  "usb_audio_automatic_routing_disabled";
  
          /**
           * The timeout in milliseconds before the device fully goes to sleep after
           * a period of inactivity.  This value sets an upper bound on how long the device
           * will stay awake or dreaming without user activity.  It should generally
           * be longer than {@link Settings.System#SCREEN_OFF_TIMEOUT} as otherwise the device
           * will sleep before it ever has a chance to dream.
           * <p>
           * Use -1 to disable this timeout.
           * </p>
           *
           * @hide
           */
          public static final String SLEEP_TIMEOUT = "sleep_timeout";
  
          /**
           * Controls whether double tap to wake is enabled.
           * @hide
           */
          public static final String DOUBLE_TAP_TO_WAKE = "double_tap_to_wake";
  
          private static final Validator DOUBLE_TAP_TO_WAKE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * The current assistant component. It could be a voice interaction service,
           * or an activity that handles ACTION_ASSIST, or empty which means using the default
           * handling.
           *
           * <p>This should be set indirectly by setting the {@link
           * android.app.role.RoleManager#ROLE_ASSISTANT assistant role}.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ASSISTANT = "assistant";
  
          /**
           * Whether the camera launch gesture should be disabled.
           *
           * @hide
           */
          public static final String CAMERA_GESTURE_DISABLED = "camera_gesture_disabled";
  
          private static final Validator CAMERA_GESTURE_DISABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the camera launch gesture to double tap the power button when the screen is off
           * should be disabled.
           *
           * @hide
           */
          public static final String CAMERA_DOUBLE_TAP_POWER_GESTURE_DISABLED =
                  "camera_double_tap_power_gesture_disabled";
  
          private static final Validator CAMERA_DOUBLE_TAP_POWER_GESTURE_DISABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether the camera double twist gesture to flip between front and back mode should be
           * enabled.
           *
           * @hide
           */
          public static final String CAMERA_DOUBLE_TWIST_TO_FLIP_ENABLED =
                  "camera_double_twist_to_flip_enabled";
  
          private static final Validator CAMERA_DOUBLE_TWIST_TO_FLIP_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not the smart camera lift trigger that launches the camera when the user moves
           * the phone into a position for taking photos should be enabled.
           *
           * @hide
           */
          public static final String CAMERA_LIFT_TRIGGER_ENABLED = "camera_lift_trigger_enabled";
  
          /**
           * The default enable state of the camera lift trigger.
           *
           * @hide
           */
          public static final int CAMERA_LIFT_TRIGGER_ENABLED_DEFAULT = 1;
  
          /**
           * Whether or not the flashlight (camera torch mode) is available required to turn
           * on flashlight.
           *
           * @hide
           */
          public static final String FLASHLIGHT_AVAILABLE = "flashlight_available";
  
          /**
           * Whether or not flashlight is enabled.
           *
           * @hide
           */
          public static final String FLASHLIGHT_ENABLED = "flashlight_enabled";
  
          /**
           * Whether or not face unlock is allowed on Keyguard.
           * @hide
           */
          public static final String FACE_UNLOCK_KEYGUARD_ENABLED = "face_unlock_keyguard_enabled";
  
          private static final Validator FACE_UNLOCK_KEYGUARD_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not face unlock dismisses the keyguard.
           * @hide
           */
          public static final String FACE_UNLOCK_DISMISSES_KEYGUARD =
                  "face_unlock_dismisses_keyguard";
  
          private static final Validator FACE_UNLOCK_DISMISSES_KEYGUARD_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not media is shown automatically when bypassing as a heads up.
           * @hide
           */
          public static final String SHOW_MEDIA_WHEN_BYPASSING =
                  "show_media_when_bypassing";
  
          private static final Validator SHOW_MEDIA_WHEN_BYPASSING_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not face unlock requires attention. This is a cached value, the source of
           * truth is obtained through the HAL.
           * @hide
           */
          public static final String FACE_UNLOCK_ATTENTION_REQUIRED =
                  "face_unlock_attention_required";
  
          /**
           * Whether or not face unlock requires a diverse set of poses during enrollment. This is a
           * cached value, the source of truth is obtained through the HAL.
           * @hide
           */
          public static final String FACE_UNLOCK_DIVERSITY_REQUIRED =
                  "face_unlock_diversity_required";
  
  
          /**
           * Whether or not face unlock is allowed for apps (through BiometricPrompt).
           * @hide
           */
          public static final String FACE_UNLOCK_APP_ENABLED = "face_unlock_app_enabled";
  
          private static final Validator FACE_UNLOCK_APP_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not face unlock always requires user confirmation, meaning {@link
           * android.hardware.biometrics.BiometricPrompt.Builder#setConfirmationRequired(boolean)}
           * is always 'true'. This overrides the behavior that apps choose in the
           * setConfirmationRequired API.
           * @hide
           */
          public static final String FACE_UNLOCK_ALWAYS_REQUIRE_CONFIRMATION =
                  "face_unlock_always_require_confirmation";
  
          private static final Validator FACE_UNLOCK_ALWAYS_REQUIRE_CONFIRMATION_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether or not a user should re enroll their face.
           *
           * Face unlock re enroll.
           *  0 = No re enrollment.
           *  1 = Re enrollment is suggested.
           *  2 = Re enrollment is required after a set time period.
           *  3 = Re enrollment is required immediately.
           *
           * @hide
           */
          public static final String FACE_UNLOCK_RE_ENROLL = "face_unlock_re_enroll";
  
          /**
           * Whether or not debugging is enabled.
           * @hide
           */
          public static final String BIOMETRIC_DEBUG_ENABLED =
                  "biometric_debug_enabled";
  
          /**
           * Whether the assist gesture should be enabled.
           *
           * @hide
           */
          public static final String ASSIST_GESTURE_ENABLED = "assist_gesture_enabled";
  
          private static final Validator ASSIST_GESTURE_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Sensitivity control for the assist gesture.
           *
           * @hide
           */
          public static final String ASSIST_GESTURE_SENSITIVITY = "assist_gesture_sensitivity";
  
          /**
           * Whether the assist gesture should silence alerts.
           *
           * @hide
           */
          public static final String ASSIST_GESTURE_SILENCE_ALERTS_ENABLED =
                  "assist_gesture_silence_alerts_enabled";
  
          private static final Validator ASSIST_GESTURE_SILENCE_ALERTS_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Whether the assist gesture should wake the phone.
           *
           * @hide
           */
          public static final String ASSIST_GESTURE_WAKE_ENABLED =
                  "assist_gesture_wake_enabled";
  
          private static final Validator ASSIST_GESTURE_WAKE_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Indicates whether the Assist Gesture Deferred Setup has been completed.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          public static final String ASSIST_GESTURE_SETUP_COMPLETE = "assist_gesture_setup_complete";
  
          /**
           * Control whether Trust Agents are in active unlock or extend unlock mode.
           * @hide
           */
          public static final String TRUST_AGENTS_EXTEND_UNLOCK = "trust_agents_extend_unlock";
  
          private static final Validator TRUST_AGENTS_EXTEND_UNLOCK_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Control whether the screen locks when trust is lost.
           * @hide
           */
          public static final String LOCK_SCREEN_WHEN_TRUST_LOST = "lock_screen_when_trust_lost";
  
          private static final Validator LOCK_SCREEN_WHEN_TRUST_LOST_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Control whether Night display is currently activated.
           * @hide
           */
          public static final String NIGHT_DISPLAY_ACTIVATED = "night_display_activated";
  
          /**
           * Control whether Night display will automatically activate/deactivate.
           * @hide
           */
          public static final String NIGHT_DISPLAY_AUTO_MODE = "night_display_auto_mode";
  
          private static final Validator NIGHT_DISPLAY_AUTO_MODE_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 2);
  
          /**
           * Control the color temperature of Night Display, represented in Kelvin.
           * @hide
           */
          public static final String NIGHT_DISPLAY_COLOR_TEMPERATURE =
                  "night_display_color_temperature";
  
          private static final Validator NIGHT_DISPLAY_COLOR_TEMPERATURE_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Custom time when Night display is scheduled to activate.
           * Represented as milliseconds from midnight (e.g. 79200000 == 10pm).
           * @hide
           */
          public static final String NIGHT_DISPLAY_CUSTOM_START_TIME =
                  "night_display_custom_start_time";
  
          private static final Validator NIGHT_DISPLAY_CUSTOM_START_TIME_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Custom time when Night display is scheduled to deactivate.
           * Represented as milliseconds from midnight (e.g. 21600000 == 6am).
           * @hide
           */
          public static final String NIGHT_DISPLAY_CUSTOM_END_TIME = "night_display_custom_end_time";
  
          private static final Validator NIGHT_DISPLAY_CUSTOM_END_TIME_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * A String representing the LocalDateTime when Night display was last activated. Use to
           * decide whether to apply the current activated state after a reboot or user change. In
           * legacy cases, this is represented by the time in milliseconds (since epoch).
           * @hide
           */
          public static final String NIGHT_DISPLAY_LAST_ACTIVATED_TIME =
                  "night_display_last_activated_time";
  
          /**
           * Control whether display white balance is currently enabled.
           * @hide
           */
          public static final String DISPLAY_WHITE_BALANCE_ENABLED = "display_white_balance_enabled";
  
          private static final Validator DISPLAY_WHITE_BALANCE_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Names of the service components that the current user has explicitly allowed to
           * be a VR mode listener, separated by ':'.
           *
           * @hide
           */
          @TestApi
          public static final String ENABLED_VR_LISTENERS = "enabled_vr_listeners";
  
          private static final Validator ENABLED_VR_LISTENERS_VALIDATOR =
                  new SettingsValidators.ComponentNameListValidator(":");
  
          /**
           * Behavior of the display while in VR mode.
           *
           * One of {@link #VR_DISPLAY_MODE_LOW_PERSISTENCE} or {@link #VR_DISPLAY_MODE_OFF}.
           *
           * @hide
           */
          public static final String VR_DISPLAY_MODE = "vr_display_mode";
  
          private static final Validator VR_DISPLAY_MODE_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[]{"0", "1"});
  
          /**
           * Lower the display persistence while the system is in VR mode.
           *
           * @see PackageManager#FEATURE_VR_MODE_HIGH_PERFORMANCE
           *
           * @hide.
           */
          public static final int VR_DISPLAY_MODE_LOW_PERSISTENCE = 0;
  
          /**
           * Do not alter the display persistence while the system is in VR mode.
           *
           * @see PackageManager#FEATURE_VR_MODE_HIGH_PERFORMANCE
           *
           * @hide.
           */
          public static final int VR_DISPLAY_MODE_OFF = 1;
  
          /**
           * Whether CarrierAppUtils#disableCarrierAppsUntilPrivileged has been executed at least
           * once.
           *
           * <p>This is used to ensure that we only take one pass which will disable apps that are not
           * privileged (if any). From then on, we only want to enable apps (when a matching SIM is
           * inserted), to avoid disabling an app that the user might actively be using.
           *
           * <p>Will be set to 1 once executed.
           *
           * @hide
           */
          public static final String CARRIER_APPS_HANDLED = "carrier_apps_handled";
  
          /**
           * Whether parent user can access remote contact in managed profile.
           *
           * @hide
           */
          public static final String MANAGED_PROFILE_CONTACT_REMOTE_SEARCH =
                  "managed_profile_contact_remote_search";
  
          /**
           * Whether parent profile can access remote calendar data in managed profile.
           *
           * @hide
           */
          public static final String CROSS_PROFILE_CALENDAR_ENABLED =
                  "cross_profile_calendar_enabled";
  
          /**
           * Whether or not the automatic storage manager is enabled and should run on the device.
           *
           * @hide
           */
          public static final String AUTOMATIC_STORAGE_MANAGER_ENABLED =
                  "automatic_storage_manager_enabled";
  
          /**
           * How many days of information for the automatic storage manager to retain on the device.
           *
           * @hide
           */
          public static final String AUTOMATIC_STORAGE_MANAGER_DAYS_TO_RETAIN =
                  "automatic_storage_manager_days_to_retain";
  
          private static final Validator AUTOMATIC_STORAGE_MANAGER_DAYS_TO_RETAIN_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * Default number of days of information for the automatic storage manager to retain.
           *
           * @hide
           */
          public static final int AUTOMATIC_STORAGE_MANAGER_DAYS_TO_RETAIN_DEFAULT = 90;
  
          /**
           * How many bytes the automatic storage manager has cleared out.
           *
           * @hide
           */
          public static final String AUTOMATIC_STORAGE_MANAGER_BYTES_CLEARED =
                  "automatic_storage_manager_bytes_cleared";
  
  
          /**
           * Last run time for the automatic storage manager.
           *
           * @hide
           */
          public static final String AUTOMATIC_STORAGE_MANAGER_LAST_RUN =
                  "automatic_storage_manager_last_run";
  
          /**
           * If the automatic storage manager has been disabled by policy. Note that this doesn't
           * mean that the automatic storage manager is prevented from being re-enabled -- this only
           * means that it was turned off by policy at least once.
           *
           * @hide
           */
          public static final String AUTOMATIC_STORAGE_MANAGER_TURNED_OFF_BY_POLICY =
                  "automatic_storage_manager_turned_off_by_policy";
  
          /**
           * Whether SystemUI navigation keys is enabled.
           * @hide
           */
          public static final String SYSTEM_NAVIGATION_KEYS_ENABLED =
                  "system_navigation_keys_enabled";
  
          private static final Validator SYSTEM_NAVIGATION_KEYS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Holds comma separated list of ordering of QS tiles.
           * @hide
           */
          public static final String QS_TILES = "sysui_qs_tiles";
  
          private static final Validator QS_TILES_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  if (value == null) {
                      return false;
                  }
                  String[] tiles = value.split(",");
                  boolean valid = true;
                  for (String tile : tiles) {
                      // tile can be any non-empty string as specified by OEM
                      valid |= ((tile.length() > 0) && ANY_STRING_VALIDATOR.validate(tile));
                  }
                  return valid;
              }
          };
  
          /**
           * Specifies whether the web action API is enabled.
           *
           * @hide
           */
          @SystemApi
          public static final String INSTANT_APPS_ENABLED = "instant_apps_enabled";
  
          /**
           * Has this pairable device been paired or upgraded from a previously paired system.
           * @hide
           */
          public static final String DEVICE_PAIRED = "device_paired";
  
          /**
           * Integer state indicating whether package verifier is enabled.
           * TODO(b/34259924): Remove this setting.
           *
           * @hide
           */
          public static final String PACKAGE_VERIFIER_STATE = "package_verifier_state";
  
          /**
           * Specifies additional package name for broadcasting the CMAS messages.
           * @hide
           */
          public static final String CMAS_ADDITIONAL_BROADCAST_PKG = "cmas_additional_broadcast_pkg";
  
          /**
           * Whether the launcher should show any notification badges.
           * The value is boolean (1 or 0).
           * @hide
           */
          @TestApi
          public static final String NOTIFICATION_BADGING = "notification_badging";
  
          private static final Validator NOTIFICATION_BADGING_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether the notification bubbles are globally enabled
           * The value is boolean (1 or 0).
           * @hide
           * @deprecated use {@link Global#NOTIFICATION_BUBBLES} instead.
           */
          @TestApi
          @Deprecated
          public static final String NOTIFICATION_BUBBLES = "notification_bubbles";
  
          /**
           * @deprecated use {@link Global#NOTIFICATION_BUBBLES_VALIDATOR} instead.
           */
          @Deprecated
          private static final Validator NOTIFICATION_BUBBLES_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether notifications are dismissed by a right-to-left swipe (instead of a left-to-right
           * swipe).
           *
           * @hide
           */
          public static final String NOTIFICATION_DISMISS_RTL = "notification_dismiss_rtl";
  
          private static final Validator NOTIFICATION_DISMISS_RTL_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Comma separated list of QS tiles that have been auto-added already.
           * @hide
           */
          public static final String QS_AUTO_ADDED_TILES = "qs_auto_tiles";
  
          private static final Validator QS_AUTO_ADDED_TILES_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  if (value == null) {
                      return false;
                  }
                  String[] tiles = value.split(",");
                  boolean valid = true;
                  for (String tile : tiles) {
                      // tile can be any non-empty string as specified by OEM
                      valid |= ((tile.length() > 0) && ANY_STRING_VALIDATOR.validate(tile));
                  }
                  return valid;
              }
          };
  
          /**
           * Whether the Lockdown button should be shown in the power menu.
           * @hide
           */
          public static final String LOCKDOWN_IN_POWER_MENU = "lockdown_in_power_menu";
  
          private static final Validator LOCKDOWN_IN_POWER_MENU_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Backup manager behavioral parameters.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "key_value_backup_interval_milliseconds=14400000,key_value_backup_require_charging=true"
           *
           * The following keys are supported:
           *
           * <pre>
           * key_value_backup_interval_milliseconds  (long)
           * key_value_backup_fuzz_milliseconds      (long)
           * key_value_backup_require_charging       (boolean)
           * key_value_backup_required_network_type  (int)
           * full_backup_interval_milliseconds       (long)
           * full_backup_require_charging            (boolean)
           * full_backup_required_network_type       (int)
           * backup_finished_notification_receivers  (String[])
           * </pre>
           *
           * backup_finished_notification_receivers uses ":" as delimeter for values.
           *
           * <p>
           * Type: string
           * @hide
           */
          public static final String BACKUP_MANAGER_CONSTANTS = "backup_manager_constants";
  
  
          /**
           * Local transport parameters so we can configure it for tests.
           * This is encoded as a key=value list, separated by commas.
           *
           * The following keys are supported:
           *
           * <pre>
           * fake_encryption_flag  (boolean)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           */
          public static final String BACKUP_LOCAL_TRANSPORT_PARAMETERS =
                  "backup_local_transport_parameters";
  
          /**
           * Flag to set if the system should predictively attempt to re-enable Bluetooth while
           * the user is driving.
           * @hide
           */
          public static final String BLUETOOTH_ON_WHILE_DRIVING = "bluetooth_on_while_driving";
  
          /**
           * What behavior should be invoked when the volume hush gesture is triggered
           * One of VOLUME_HUSH_OFF, VOLUME_HUSH_VIBRATE, VOLUME_HUSH_MUTE.
           *
           * @hide
           */
          @SystemApi
          public static final String VOLUME_HUSH_GESTURE = "volume_hush_gesture";
  
          /** @hide */
          @SystemApi
          public static final int VOLUME_HUSH_OFF = 0;
          /** @hide */
          @SystemApi
          public static final int VOLUME_HUSH_VIBRATE = 1;
          /** @hide */
          @SystemApi
          public static final int VOLUME_HUSH_MUTE = 2;
  
          private static final Validator VOLUME_HUSH_GESTURE_VALIDATOR =
                  NON_NEGATIVE_INTEGER_VALIDATOR;
  
          /**
           * The number of times (integer) the user has manually enabled battery saver.
           * @hide
           */
          public static final String LOW_POWER_MANUAL_ACTIVATION_COUNT =
                  "low_power_manual_activation_count";
  
          /**
           * Whether the "first time battery saver warning" dialog needs to be shown (0: default)
           * or not (1).
           *
           * @hide
           */
          public static final String LOW_POWER_WARNING_ACKNOWLEDGED =
                  "low_power_warning_acknowledged";
  
          /**
           * 0 (default) Auto battery saver suggestion has not been suppressed. 1) it has been
           * suppressed.
           * @hide
           */
          public static final String SUPPRESS_AUTO_BATTERY_SAVER_SUGGESTION =
                  "suppress_auto_battery_saver_suggestion";
  
          /**
           * List of packages, which data need to be unconditionally cleared before full restore.
           * Type: string
           * @hide
           */
          public static final String PACKAGES_TO_CLEAR_DATA_BEFORE_FULL_RESTORE =
                  "packages_to_clear_data_before_full_restore";
  
          /**
           * Setting to determine whether to use the new notification priority handling features.
           * @hide
           */
          public static final String NOTIFICATION_NEW_INTERRUPTION_MODEL = "new_interruption_model";
  
          /**
           * How often to check for location access.
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String LOCATION_ACCESS_CHECK_INTERVAL_MILLIS =
                  "location_access_check_interval_millis";
  
          /**
           * Delay between granting location access and checking it.
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String LOCATION_ACCESS_CHECK_DELAY_MILLIS =
                  "location_access_check_delay_millis";
  
          /**
           * What should happen to the location permissions when upgraded to Android Q.
           *
           * <ul>
           *     <li>0/unset == revoke permissions</li>
           *     <li>anything else == Don't do anything</li>
           * </ul>
           *
           * @hide
           */
          @SystemApi
          public static final String LOCATION_PERMISSIONS_UPGRADE_TO_Q_MODE =
                  "location_permissions_upgrade_to_q_mode";
  
          /**
           * Map of android.theme.customization.* categories to the enabled overlay package for that
           * category, formatted as a serialized {@link org.json.JSONObject}. If there is no
           * corresponding package included for a category, then all overlay packages in that
           * category must be disabled.
           * @hide
           */
          @SystemApi
          public static final String THEME_CUSTOMIZATION_OVERLAY_PACKAGES =
                  "theme_customization_overlay_packages";
  
          private static final Validator THEME_CUSTOMIZATION_OVERLAY_PACKAGES_VALIDATOR =
                  SettingsValidators.JSON_OBJECT_VALIDATOR;
  
          /**
           * Navigation bar mode.
           *  0 = 3 button
           *  1 = 2 button
           *  2 = fully gestural
           * @hide
           */
          public static final String NAVIGATION_MODE =
                  "navigation_mode";
          private static final Validator NAVIGATION_MODE_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[] {"0", "1", "2"});
  
          /**
           * Current provider of proximity-based sharing services.
           * Default value in @string/config_defaultNearbySharingComponent.
           * No VALIDATOR as this setting will not be backed up.
           * @hide
           */
          public static final String NEARBY_SHARING_COMPONENT = "nearby_sharing_component";
  
          /**
           * Controls whether aware is enabled.
           * @hide
           */
          public static final String AWARE_ENABLED = "aware_enabled";
  
          private static final Validator AWARE_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Controls whether aware_lock is enabled.
           * @hide
           */
          public static final String AWARE_LOCK_ENABLED = "aware_lock_enabled";
  
          private static final Validator AWARE_LOCK_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Controls whether tap gesture is enabled.
           * @hide
           */
          public static final String TAP_GESTURE = "tap_gesture";
  
          private static final Validator TAP_GESTURE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * This are the settings to be backed up.
           *
           * NOTE: Settings are backed up and restored in the order they appear
           *       in this array. If you have one setting depending on another,
           *       make sure that they are ordered appropriately.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String[] SETTINGS_TO_BACKUP = {
              BUGREPORT_IN_POWER_MENU,                            // moved to global
              ALLOW_MOCK_LOCATION,
              USB_MASS_STORAGE_ENABLED,                           // moved to global
              ACCESSIBILITY_DISPLAY_INVERSION_ENABLED,
              ACCESSIBILITY_DISPLAY_DALTONIZER,
              ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED,
              ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED,
              ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED,
              AUTOFILL_SERVICE,
              ACCESSIBILITY_DISPLAY_MAGNIFICATION_SCALE,
              ENABLED_ACCESSIBILITY_SERVICES,
              ENABLED_VR_LISTENERS,
              TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES,
              TOUCH_EXPLORATION_ENABLED,
              ACCESSIBILITY_ENABLED,
              ACCESSIBILITY_SHORTCUT_TARGET_SERVICE,
              ACCESSIBILITY_BUTTON_TARGET_COMPONENT,
              ACCESSIBILITY_SHORTCUT_DIALOG_SHOWN,
              ACCESSIBILITY_SHORTCUT_ENABLED,
              ACCESSIBILITY_SHORTCUT_ON_LOCK_SCREEN,
              ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED,
              ACCESSIBILITY_CAPTIONING_PRESET,
              ACCESSIBILITY_CAPTIONING_ENABLED,
              ACCESSIBILITY_CAPTIONING_LOCALE,
              ACCESSIBILITY_CAPTIONING_BACKGROUND_COLOR,
              ACCESSIBILITY_CAPTIONING_FOREGROUND_COLOR,
              ACCESSIBILITY_CAPTIONING_EDGE_TYPE,
              ACCESSIBILITY_CAPTIONING_EDGE_COLOR,
              ACCESSIBILITY_CAPTIONING_TYPEFACE,
              ACCESSIBILITY_CAPTIONING_FONT_SCALE,
              ACCESSIBILITY_CAPTIONING_WINDOW_COLOR,
              TTS_DEFAULT_RATE,
              TTS_DEFAULT_PITCH,
              TTS_DEFAULT_SYNTH,
              TTS_ENABLED_PLUGINS,
              TTS_DEFAULT_LOCALE,
              SHOW_IME_WITH_HARD_KEYBOARD,
              WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON,            // moved to global
              WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY,               // moved to global
              WIFI_NUM_OPEN_NETWORKS_KEPT,                        // moved to global
              MOUNT_PLAY_NOTIFICATION_SND,
              MOUNT_UMS_AUTOSTART,
              MOUNT_UMS_PROMPT,
              MOUNT_UMS_NOTIFY_ENABLED,
              DOUBLE_TAP_TO_WAKE,
              WAKE_GESTURE_ENABLED,
              LONG_PRESS_TIMEOUT,
              CAMERA_GESTURE_DISABLED,
              ACCESSIBILITY_AUTOCLICK_ENABLED,
              ACCESSIBILITY_AUTOCLICK_DELAY,
              ACCESSIBILITY_LARGE_POINTER_ICON,
              PREFERRED_TTY_MODE,
              ENHANCED_VOICE_PRIVACY_ENABLED,
              TTY_MODE_ENABLED,
              RTT_CALLING_MODE,
              INCALL_POWER_BUTTON_BEHAVIOR,
              NIGHT_DISPLAY_CUSTOM_START_TIME,
              NIGHT_DISPLAY_CUSTOM_END_TIME,
              NIGHT_DISPLAY_COLOR_TEMPERATURE,
              NIGHT_DISPLAY_AUTO_MODE,
              DISPLAY_WHITE_BALANCE_ENABLED,
              SYNC_PARENT_SOUNDS,
              CAMERA_DOUBLE_TWIST_TO_FLIP_ENABLED,
              CAMERA_DOUBLE_TAP_POWER_GESTURE_DISABLED,
              SYSTEM_NAVIGATION_KEYS_ENABLED,
              QS_TILES,
              DOZE_ENABLED,
              DOZE_ALWAYS_ON,
              DOZE_PICK_UP_GESTURE,
              DOZE_DOUBLE_TAP_GESTURE,
              DOZE_TAP_SCREEN_GESTURE,
              NFC_PAYMENT_DEFAULT_COMPONENT,
              AUTOMATIC_STORAGE_MANAGER_DAYS_TO_RETAIN,
              FACE_UNLOCK_KEYGUARD_ENABLED,
              SHOW_MEDIA_WHEN_BYPASSING,
              FACE_UNLOCK_DISMISSES_KEYGUARD,
              FACE_UNLOCK_APP_ENABLED,
              FACE_UNLOCK_ALWAYS_REQUIRE_CONFIRMATION,
              VR_DISPLAY_MODE,
              NOTIFICATION_BADGING,
              NOTIFICATION_DISMISS_RTL,
              QS_AUTO_ADDED_TILES,
              SCREENSAVER_ENABLED,
              SCREENSAVER_COMPONENTS,
              SCREENSAVER_ACTIVATE_ON_DOCK,
              SCREENSAVER_ACTIVATE_ON_SLEEP,
              LOCKDOWN_IN_POWER_MENU,
              SHOW_FIRST_CRASH_DIALOG_DEV_OPTION,
              VOLUME_HUSH_GESTURE,
              MANUAL_RINGER_TOGGLE_COUNT,
              HUSH_GESTURE_USED,
              IN_CALL_NOTIFICATION_ENABLED,
              LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS,
              LOCK_SCREEN_CUSTOM_CLOCK_FACE,
              LOCK_SCREEN_SHOW_NOTIFICATIONS,
              LOCK_SCREEN_SHOW_SILENT_NOTIFICATIONS,
              SHOW_NOTIFICATION_SNOOZE,
              ZEN_DURATION,
              SHOW_ZEN_UPGRADE_NOTIFICATION,
              SHOW_ZEN_SETTINGS_SUGGESTION,
              ZEN_SETTINGS_UPDATED,
              ZEN_SETTINGS_SUGGESTION_VIEWED,
              CHARGING_SOUNDS_ENABLED,
              CHARGING_VIBRATION_ENABLED,
              ACCESSIBILITY_NON_INTERACTIVE_UI_TIMEOUT_MS,
              ACCESSIBILITY_INTERACTIVE_UI_TIMEOUT_MS,
              NOTIFICATION_NEW_INTERRUPTION_MODEL,
              TRUST_AGENTS_EXTEND_UNLOCK,
              UI_NIGHT_MODE,
              LOCK_SCREEN_WHEN_TRUST_LOST,
              SKIP_DIRECTION,
              THEME_CUSTOMIZATION_OVERLAY_PACKAGES,
              NAVIGATION_MODE,
              SKIP_GESTURE_COUNT,
              SKIP_TOUCH_COUNT,
              SILENCE_ALARMS_GESTURE_COUNT,
              SILENCE_CALL_GESTURE_COUNT,
              SILENCE_TIMER_GESTURE_COUNT,
              SILENCE_ALARMS_TOUCH_COUNT,
              SILENCE_CALL_TOUCH_COUNT,
              SILENCE_TIMER_TOUCH_COUNT,
              DARK_MODE_DIALOG_SEEN,
              GLOBAL_ACTIONS_PANEL_ENABLED,
              AWARE_LOCK_ENABLED,
              AWARE_TAP_PAUSE_GESTURE_COUNT,
              AWARE_TAP_PAUSE_TOUCH_COUNT
          };
  
          /**
           * All settings in {@link SETTINGS_TO_BACKUP} array *must* have a non-null validator,
           * otherwise they won't be restored.
           *
           * @hide
           */
          public static final Map<String, Validator> VALIDATORS = new ArrayMap<>();
          static {
              VALIDATORS.put(BUGREPORT_IN_POWER_MENU, BUGREPORT_IN_POWER_MENU_VALIDATOR);
              VALIDATORS.put(ALLOW_MOCK_LOCATION, ALLOW_MOCK_LOCATION_VALIDATOR);
              VALIDATORS.put(USB_MASS_STORAGE_ENABLED, USB_MASS_STORAGE_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_DISPLAY_INVERSION_ENABLED,
                      ACCESSIBILITY_DISPLAY_INVERSION_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_DISPLAY_DALTONIZER,
                      ACCESSIBILITY_DISPLAY_DALTONIZER_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED,
                      ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED,
                      ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED,
                      ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED_VALIDATOR);
              VALIDATORS.put(AUTOFILL_SERVICE, AUTOFILL_SERVICE_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_DISPLAY_MAGNIFICATION_SCALE,
                      ACCESSIBILITY_DISPLAY_MAGNIFICATION_SCALE_VALIDATOR);
              VALIDATORS.put(ENABLED_ACCESSIBILITY_SERVICES,
                      ENABLED_ACCESSIBILITY_SERVICES_VALIDATOR);
              VALIDATORS.put(ENABLED_VR_LISTENERS, ENABLED_VR_LISTENERS_VALIDATOR);
              VALIDATORS.put(TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES,
                      TOUCH_EXPLORATION_GRANTED_ACCESSIBILITY_SERVICES_VALIDATOR);
              VALIDATORS.put(TOUCH_EXPLORATION_ENABLED, TOUCH_EXPLORATION_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_ENABLED, ACCESSIBILITY_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_SHORTCUT_TARGET_SERVICE,
                      ACCESSIBILITY_SHORTCUT_TARGET_SERVICE_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_BUTTON_TARGET_COMPONENT,
                      ACCESSIBILITY_BUTTON_TARGET_COMPONENT_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_SHORTCUT_DIALOG_SHOWN,
                      ACCESSIBILITY_SHORTCUT_DIALOG_SHOWN_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_SHORTCUT_ENABLED,
                      ACCESSIBILITY_SHORTCUT_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_SHORTCUT_ON_LOCK_SCREEN,
                      ACCESSIBILITY_SHORTCUT_ON_LOCK_SCREEN_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED,
                      ACCESSIBILITY_HIGH_TEXT_CONTRAST_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_PRESET,
                      ACCESSIBILITY_CAPTIONING_PRESET_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_ENABLED,
                      ACCESSIBILITY_CAPTIONING_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_LOCALE,
                      ACCESSIBILITY_CAPTIONING_LOCALE_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_BACKGROUND_COLOR,
                      ACCESSIBILITY_CAPTIONING_BACKGROUND_COLOR_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_FOREGROUND_COLOR,
                      ACCESSIBILITY_CAPTIONING_FOREGROUND_COLOR_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_EDGE_TYPE,
                      ACCESSIBILITY_CAPTIONING_EDGE_TYPE_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_EDGE_COLOR,
                      ACCESSIBILITY_CAPTIONING_EDGE_COLOR_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_TYPEFACE,
                      ACCESSIBILITY_CAPTIONING_TYPEFACE_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_FONT_SCALE,
                      ACCESSIBILITY_CAPTIONING_FONT_SCALE_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_CAPTIONING_WINDOW_COLOR,
                      ACCESSIBILITY_CAPTIONING_WINDOW_COLOR_VALIDATOR);
              VALIDATORS.put(TTS_DEFAULT_RATE, TTS_DEFAULT_RATE_VALIDATOR);
              VALIDATORS.put(TTS_DEFAULT_PITCH, TTS_DEFAULT_PITCH_VALIDATOR);
              VALIDATORS.put(TTS_DEFAULT_SYNTH, TTS_DEFAULT_SYNTH_VALIDATOR);
              VALIDATORS.put(TTS_ENABLED_PLUGINS, TTS_ENABLED_PLUGINS_VALIDATOR);
              VALIDATORS.put(TTS_DEFAULT_LOCALE, TTS_DEFAULT_LOCALE_VALIDATOR);
              VALIDATORS.put(SHOW_IME_WITH_HARD_KEYBOARD, SHOW_IME_WITH_HARD_KEYBOARD_VALIDATOR);
              VALIDATORS.put(WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON,
                      WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON_VALIDATOR);
              VALIDATORS.put(WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY,
                      WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY_VALIDATOR);
              VALIDATORS.put(WIFI_NUM_OPEN_NETWORKS_KEPT, WIFI_NUM_OPEN_NETWORKS_KEPT_VALIDATOR);
              VALIDATORS.put(MOUNT_PLAY_NOTIFICATION_SND, MOUNT_PLAY_NOTIFICATION_SND_VALIDATOR);
              VALIDATORS.put(MOUNT_UMS_AUTOSTART, MOUNT_UMS_AUTOSTART_VALIDATOR);
              VALIDATORS.put(MOUNT_UMS_PROMPT, MOUNT_UMS_PROMPT_VALIDATOR);
              VALIDATORS.put(MOUNT_UMS_NOTIFY_ENABLED, MOUNT_UMS_NOTIFY_ENABLED_VALIDATOR);
              VALIDATORS.put(DOUBLE_TAP_TO_WAKE, DOUBLE_TAP_TO_WAKE_VALIDATOR);
              VALIDATORS.put(WAKE_GESTURE_ENABLED, WAKE_GESTURE_ENABLED_VALIDATOR);
              VALIDATORS.put(LONG_PRESS_TIMEOUT, LONG_PRESS_TIMEOUT_VALIDATOR);
              VALIDATORS.put(CAMERA_GESTURE_DISABLED, CAMERA_GESTURE_DISABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_AUTOCLICK_ENABLED,
                      ACCESSIBILITY_AUTOCLICK_ENABLED_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_AUTOCLICK_DELAY, ACCESSIBILITY_AUTOCLICK_DELAY_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_LARGE_POINTER_ICON,
                      ACCESSIBILITY_LARGE_POINTER_ICON_VALIDATOR);
              VALIDATORS.put(PREFERRED_TTY_MODE, PREFERRED_TTY_MODE_VALIDATOR);
              VALIDATORS.put(ENHANCED_VOICE_PRIVACY_ENABLED,
                      ENHANCED_VOICE_PRIVACY_ENABLED_VALIDATOR);
              VALIDATORS.put(TTY_MODE_ENABLED, TTY_MODE_ENABLED_VALIDATOR);
              VALIDATORS.put(RTT_CALLING_MODE, RTT_CALLING_MODE_VALIDATOR);
              VALIDATORS.put(INCALL_POWER_BUTTON_BEHAVIOR, INCALL_POWER_BUTTON_BEHAVIOR_VALIDATOR);
              VALIDATORS.put(NIGHT_DISPLAY_CUSTOM_START_TIME,
                      NIGHT_DISPLAY_CUSTOM_START_TIME_VALIDATOR);
              VALIDATORS.put(NIGHT_DISPLAY_CUSTOM_END_TIME, NIGHT_DISPLAY_CUSTOM_END_TIME_VALIDATOR);
              VALIDATORS.put(NIGHT_DISPLAY_COLOR_TEMPERATURE,
                      NIGHT_DISPLAY_COLOR_TEMPERATURE_VALIDATOR);
              VALIDATORS.put(NIGHT_DISPLAY_AUTO_MODE, NIGHT_DISPLAY_AUTO_MODE_VALIDATOR);
              VALIDATORS.put(DISPLAY_WHITE_BALANCE_ENABLED, DISPLAY_WHITE_BALANCE_ENABLED_VALIDATOR);
              VALIDATORS.put(SYNC_PARENT_SOUNDS, SYNC_PARENT_SOUNDS_VALIDATOR);
              VALIDATORS.put(CAMERA_DOUBLE_TWIST_TO_FLIP_ENABLED,
                      CAMERA_DOUBLE_TWIST_TO_FLIP_ENABLED_VALIDATOR);
              VALIDATORS.put(CAMERA_DOUBLE_TAP_POWER_GESTURE_DISABLED,
                      CAMERA_DOUBLE_TAP_POWER_GESTURE_DISABLED_VALIDATOR);
              VALIDATORS.put(SYSTEM_NAVIGATION_KEYS_ENABLED,
                      SYSTEM_NAVIGATION_KEYS_ENABLED_VALIDATOR);
              VALIDATORS.put(QS_TILES, QS_TILES_VALIDATOR);
              VALIDATORS.put(DOZE_ENABLED, DOZE_ENABLED_VALIDATOR);
              VALIDATORS.put(DOZE_ALWAYS_ON, DOZE_ALWAYS_ON_VALIDATOR);
              VALIDATORS.put(DOZE_PICK_UP_GESTURE, DOZE_PICK_UP_GESTURE_VALIDATOR);
              VALIDATORS.put(DOZE_DOUBLE_TAP_GESTURE, DOZE_DOUBLE_TAP_GESTURE_VALIDATOR);
              VALIDATORS.put(DOZE_TAP_SCREEN_GESTURE, DOZE_TAP_SCREEN_GESTURE_VALIDATOR);
              VALIDATORS.put(DOZE_WAKE_LOCK_SCREEN_GESTURE, DOZE_WAKE_LOCK_SCREEN_GESTURE_VALIDATOR);
              VALIDATORS.put(DOZE_WAKE_DISPLAY_GESTURE, DOZE_WAKE_DISPLAY_GESTURE_VALIDATOR);
              VALIDATORS.put(NFC_PAYMENT_DEFAULT_COMPONENT, NFC_PAYMENT_DEFAULT_COMPONENT_VALIDATOR);
              VALIDATORS.put(AUTOMATIC_STORAGE_MANAGER_DAYS_TO_RETAIN,
                      AUTOMATIC_STORAGE_MANAGER_DAYS_TO_RETAIN_VALIDATOR);
              VALIDATORS.put(FACE_UNLOCK_KEYGUARD_ENABLED, FACE_UNLOCK_KEYGUARD_ENABLED_VALIDATOR);
              VALIDATORS.put(FACE_UNLOCK_DISMISSES_KEYGUARD,
                      FACE_UNLOCK_DISMISSES_KEYGUARD_VALIDATOR);
              VALIDATORS.put(SHOW_MEDIA_WHEN_BYPASSING, SHOW_MEDIA_WHEN_BYPASSING_VALIDATOR);
              VALIDATORS.put(FACE_UNLOCK_APP_ENABLED, FACE_UNLOCK_APP_ENABLED_VALIDATOR);
              VALIDATORS.put(FACE_UNLOCK_ALWAYS_REQUIRE_CONFIRMATION,
                      FACE_UNLOCK_ALWAYS_REQUIRE_CONFIRMATION_VALIDATOR);
              VALIDATORS.put(ASSIST_GESTURE_ENABLED, ASSIST_GESTURE_ENABLED_VALIDATOR);
              VALIDATORS.put(ASSIST_GESTURE_SILENCE_ALERTS_ENABLED,
                      ASSIST_GESTURE_SILENCE_ALERTS_ENABLED_VALIDATOR);
              VALIDATORS.put(ASSIST_GESTURE_WAKE_ENABLED, ASSIST_GESTURE_WAKE_ENABLED_VALIDATOR);
              VALIDATORS.put(VR_DISPLAY_MODE, VR_DISPLAY_MODE_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_BADGING, NOTIFICATION_BADGING_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_BUBBLES, NOTIFICATION_BUBBLES_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_DISMISS_RTL, NOTIFICATION_DISMISS_RTL_VALIDATOR);
              VALIDATORS.put(QS_AUTO_ADDED_TILES, QS_AUTO_ADDED_TILES_VALIDATOR);
              VALIDATORS.put(SCREENSAVER_ENABLED, SCREENSAVER_ENABLED_VALIDATOR);
              VALIDATORS.put(SCREENSAVER_COMPONENTS, SCREENSAVER_COMPONENTS_VALIDATOR);
              VALIDATORS.put(SCREENSAVER_ACTIVATE_ON_DOCK, SCREENSAVER_ACTIVATE_ON_DOCK_VALIDATOR);
              VALIDATORS.put(SCREENSAVER_ACTIVATE_ON_SLEEP, SCREENSAVER_ACTIVATE_ON_SLEEP_VALIDATOR);
              VALIDATORS.put(LOCKDOWN_IN_POWER_MENU, LOCKDOWN_IN_POWER_MENU_VALIDATOR);
              VALIDATORS.put(SHOW_FIRST_CRASH_DIALOG_DEV_OPTION,
                      SHOW_FIRST_CRASH_DIALOG_DEV_OPTION_VALIDATOR);
              VALIDATORS.put(VOLUME_HUSH_GESTURE, VOLUME_HUSH_GESTURE_VALIDATOR);
              VALIDATORS.put(ENABLED_NOTIFICATION_LISTENERS,
                      ENABLED_NOTIFICATION_LISTENERS_VALIDATOR); //legacy restore setting
              VALIDATORS.put(ENABLED_NOTIFICATION_ASSISTANT,
                      ENABLED_NOTIFICATION_ASSISTANT_VALIDATOR); //legacy restore setting
              VALIDATORS.put(ENABLED_NOTIFICATION_POLICY_ACCESS_PACKAGES,
                      ENABLED_NOTIFICATION_POLICY_ACCESS_PACKAGES_VALIDATOR); //legacy restore setting
              VALIDATORS.put(HUSH_GESTURE_USED, HUSH_GESTURE_USED_VALIDATOR);
              VALIDATORS.put(MANUAL_RINGER_TOGGLE_COUNT, MANUAL_RINGER_TOGGLE_COUNT_VALIDATOR);
              VALIDATORS.put(IN_CALL_NOTIFICATION_ENABLED, IN_CALL_NOTIFICATION_ENABLED_VALIDATOR);
              VALIDATORS.put(LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, BOOLEAN_VALIDATOR);
              VALIDATORS.put(LOCK_SCREEN_SHOW_NOTIFICATIONS, BOOLEAN_VALIDATOR);
              VALIDATORS.put(LOCK_SCREEN_SHOW_SILENT_NOTIFICATIONS, BOOLEAN_VALIDATOR);
              VALIDATORS.put(SHOW_NOTIFICATION_SNOOZE, BOOLEAN_VALIDATOR);
              VALIDATORS.put(ZEN_DURATION, ZEN_DURATION_VALIDATOR);
              VALIDATORS.put(SHOW_ZEN_UPGRADE_NOTIFICATION, BOOLEAN_VALIDATOR);
              VALIDATORS.put(SHOW_ZEN_SETTINGS_SUGGESTION, BOOLEAN_VALIDATOR);
              VALIDATORS.put(ZEN_SETTINGS_UPDATED, BOOLEAN_VALIDATOR);
              VALIDATORS.put(ZEN_SETTINGS_SUGGESTION_VIEWED, BOOLEAN_VALIDATOR);
              VALIDATORS.put(CHARGING_SOUNDS_ENABLED, BOOLEAN_VALIDATOR);
              VALIDATORS.put(CHARGING_VIBRATION_ENABLED, BOOLEAN_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_NON_INTERACTIVE_UI_TIMEOUT_MS,
                      NON_NEGATIVE_INTEGER_VALIDATOR);
              VALIDATORS.put(ACCESSIBILITY_INTERACTIVE_UI_TIMEOUT_MS, NON_NEGATIVE_INTEGER_VALIDATOR);
              VALIDATORS.put(USER_SETUP_COMPLETE, BOOLEAN_VALIDATOR);
              VALIDATORS.put(ASSIST_GESTURE_SETUP_COMPLETE, BOOLEAN_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_NEW_INTERRUPTION_MODEL, BOOLEAN_VALIDATOR);
              VALIDATORS.put(TRUST_AGENTS_EXTEND_UNLOCK, TRUST_AGENTS_EXTEND_UNLOCK_VALIDATOR);
              VALIDATORS.put(LOCK_SCREEN_CUSTOM_CLOCK_FACE, LOCK_SCREEN_CUSTOM_CLOCK_FACE_VALIDATOR);
              VALIDATORS.put(LOCK_SCREEN_WHEN_TRUST_LOST, LOCK_SCREEN_WHEN_TRUST_LOST_VALIDATOR);
              VALIDATORS.put(SKIP_GESTURE, SKIP_GESTURE_VALIDATOR);
              VALIDATORS.put(SKIP_DIRECTION, SKIP_DIRECTION_VALIDATOR);
              VALIDATORS.put(SKIP_DIRECTION, SKIP_DIRECTION_VALIDATOR);
              VALIDATORS.put(SILENCE_GESTURE, SILENCE_GESTURE_VALIDATOR);
              VALIDATORS.put(THEME_CUSTOMIZATION_OVERLAY_PACKAGES,
                      THEME_CUSTOMIZATION_OVERLAY_PACKAGES_VALIDATOR);
              VALIDATORS.put(NAVIGATION_MODE, NAVIGATION_MODE_VALIDATOR);
              VALIDATORS.put(AWARE_ENABLED, AWARE_ENABLED_VALIDATOR);
              VALIDATORS.put(SKIP_GESTURE_COUNT, SKIP_GESTURE_COUNT_VALIDATOR);
              VALIDATORS.put(SKIP_TOUCH_COUNT, SKIP_GESTURE_COUNT_VALIDATOR);
              VALIDATORS.put(SILENCE_ALARMS_GESTURE_COUNT, SILENCE_GESTURE_COUNT_VALIDATOR);
              VALIDATORS.put(SILENCE_TIMER_GESTURE_COUNT, SILENCE_GESTURE_COUNT_VALIDATOR);
              VALIDATORS.put(SILENCE_CALL_GESTURE_COUNT, SILENCE_GESTURE_COUNT_VALIDATOR);
              VALIDATORS.put(SILENCE_ALARMS_TOUCH_COUNT, SILENCE_GESTURE_COUNT_VALIDATOR);
              VALIDATORS.put(SILENCE_TIMER_TOUCH_COUNT, SILENCE_GESTURE_COUNT_VALIDATOR);
              VALIDATORS.put(SILENCE_CALL_TOUCH_COUNT, SILENCE_GESTURE_COUNT_VALIDATOR);
              VALIDATORS.put(ODI_CAPTIONS_ENABLED, ODI_CAPTIONS_ENABLED_VALIDATOR);
              VALIDATORS.put(DARK_MODE_DIALOG_SEEN, BOOLEAN_VALIDATOR);
              VALIDATORS.put(UI_NIGHT_MODE, UI_NIGHT_MODE_VALIDATOR);
              VALIDATORS.put(GLOBAL_ACTIONS_PANEL_ENABLED, GLOBAL_ACTIONS_PANEL_ENABLED_VALIDATOR);
              VALIDATORS.put(AWARE_LOCK_ENABLED, AWARE_LOCK_ENABLED_VALIDATOR);
              VALIDATORS.put(AWARE_TAP_PAUSE_GESTURE_COUNT, NON_NEGATIVE_INTEGER_VALIDATOR);
              VALIDATORS.put(AWARE_TAP_PAUSE_TOUCH_COUNT, NON_NEGATIVE_INTEGER_VALIDATOR);
              VALIDATORS.put(TAP_GESTURE, TAP_GESTURE_VALIDATOR);
          }
  
          /**
           * Keys we no longer back up under the current schema, but want to continue to
           * process when restoring historical backup datasets.
           *
           * All settings in {@link LEGACY_RESTORE_SETTINGS} array *must* have a non-null validator,
           * otherwise they won't be restored.
           *
           * @hide
           */
          public static final String[] LEGACY_RESTORE_SETTINGS = {
                  ENABLED_NOTIFICATION_LISTENERS,
                  ENABLED_NOTIFICATION_ASSISTANT,
                  ENABLED_NOTIFICATION_POLICY_ACCESS_PACKAGES
          };
  
          /**
           * These entries are considered common between the personal and the managed profile,
           * since the managed profile doesn't get to change them.
           */
          private static final Set<String> CLONE_TO_MANAGED_PROFILE = new ArraySet<>();
  
          static {
              CLONE_TO_MANAGED_PROFILE.add(ACCESSIBILITY_ENABLED);
              CLONE_TO_MANAGED_PROFILE.add(ALLOW_MOCK_LOCATION);
              CLONE_TO_MANAGED_PROFILE.add(ALLOWED_GEOLOCATION_ORIGINS);
              CLONE_TO_MANAGED_PROFILE.add(CONTENT_CAPTURE_ENABLED);
              CLONE_TO_MANAGED_PROFILE.add(ENABLED_ACCESSIBILITY_SERVICES);
              CLONE_TO_MANAGED_PROFILE.add(LOCATION_CHANGER);
              CLONE_TO_MANAGED_PROFILE.add(LOCATION_MODE);
              CLONE_TO_MANAGED_PROFILE.add(LOCATION_PROVIDERS_ALLOWED);
              CLONE_TO_MANAGED_PROFILE.add(SHOW_IME_WITH_HARD_KEYBOARD);
              if (!InputMethodSystemProperty.PER_PROFILE_IME_ENABLED) {
                  CLONE_TO_MANAGED_PROFILE.add(DEFAULT_INPUT_METHOD);
                  CLONE_TO_MANAGED_PROFILE.add(ENABLED_INPUT_METHODS);
                  CLONE_TO_MANAGED_PROFILE.add(SELECTED_INPUT_METHOD_SUBTYPE);
                  CLONE_TO_MANAGED_PROFILE.add(SELECTED_SPELL_CHECKER);
                  CLONE_TO_MANAGED_PROFILE.add(SELECTED_SPELL_CHECKER_SUBTYPE);
              }
          }
  
          /** @hide */
          public static void getCloneToManagedProfileSettings(Set<String> outKeySet) {
              outKeySet.addAll(CLONE_TO_MANAGED_PROFILE);
          }
  
          /**
           * Secure settings which can be accessed by instant apps.
           * @hide
           */
          public static final Set<String> INSTANT_APP_SETTINGS = new ArraySet<>();
          static {
              INSTANT_APP_SETTINGS.add(ENABLED_ACCESSIBILITY_SERVICES);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_SPEAK_PASSWORD);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_DISPLAY_INVERSION_ENABLED);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_ENABLED);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_PRESET);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_EDGE_TYPE);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_EDGE_COLOR);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_LOCALE);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_BACKGROUND_COLOR);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_FOREGROUND_COLOR);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_TYPEFACE);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_FONT_SCALE);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_CAPTIONING_WINDOW_COLOR);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_DISPLAY_DALTONIZER);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_AUTOCLICK_DELAY);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_AUTOCLICK_ENABLED);
              INSTANT_APP_SETTINGS.add(ACCESSIBILITY_LARGE_POINTER_ICON);
  
              INSTANT_APP_SETTINGS.add(DEFAULT_INPUT_METHOD);
              INSTANT_APP_SETTINGS.add(ENABLED_INPUT_METHODS);
  
              INSTANT_APP_SETTINGS.add(ANDROID_ID);
  
              INSTANT_APP_SETTINGS.add(PACKAGE_VERIFIER_USER_CONSENT);
              INSTANT_APP_SETTINGS.add(ALLOW_MOCK_LOCATION);
          }
  
          /**
           * Helper method for determining if a location provider is enabled.
           *
           * @param cr the content resolver to use
           * @param provider the location provider to query
           * @return true if the provider is enabled
           *
           * @deprecated use {@link LocationManager#isProviderEnabled(String)}
           */
          @Deprecated
          public static boolean isLocationProviderEnabled(ContentResolver cr, String provider) {
              String allowedProviders = Settings.Secure.getStringForUser(cr,
                      LOCATION_PROVIDERS_ALLOWED, cr.getUserId());
              return TextUtils.delimitedStringContains(allowedProviders, ',', provider);
          }
  
          /**
           * Thread-safe method for enabling or disabling a single location provider. This will have
           * no effect on Android Q and above.
           * @param cr the content resolver to use
           * @param provider the location provider to enable or disable
           * @param enabled true if the provider should be enabled
           * @deprecated This API is deprecated
           */
          @Deprecated
          public static void setLocationProviderEnabled(ContentResolver cr,
                  String provider, boolean enabled) {
          }
      }
  
      /**
       * Global system settings, containing preferences that always apply identically
       * to all defined users.  Applications can read these but are not allowed to write;
       * like the "Secure" settings, these are for preferences that the user must
       * explicitly modify through the system UI or specialized APIs for those values.
       */
      public static final class Global extends NameValueTable {
          // NOTE: If you add new settings here, be sure to add them to
          // com.android.providers.settings.SettingsProtoDumpUtil#dumpProtoGlobalSettingsLocked.
  
          /**
           * The content:// style URL for global secure settings items.  Not public.
           */
          public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/global");
  
          /**
           * Whether the notification bubbles are globally enabled
           * The value is boolean (1 or 0).
           * @hide
           */
          @TestApi
          public static final String NOTIFICATION_BUBBLES = "notification_bubbles";
  
          private static final Validator NOTIFICATION_BUBBLES_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether users are allowed to add more users or guest from lockscreen.
           * <p>
           * Type: int
           * @hide
           */
          public static final String ADD_USERS_WHEN_LOCKED = "add_users_when_locked";
  
          /**
           * Whether applying ramping ringer on incoming phone call ringtone.
           * <p>1 = apply ramping ringer
           * <p>0 = do not apply ramping ringer
           */
          public static final String APPLY_RAMPING_RINGER = "apply_ramping_ringer";
  
          private static final Validator APPLY_RAMPING_RINGER_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Setting whether the global gesture for enabling accessibility is enabled.
           * If this gesture is enabled the user will be able to perfrom it to enable
           * the accessibility state without visiting the settings app.
           *
           * @hide
           * No longer used. Should be removed once all dependencies have been updated.
           */
          @UnsupportedAppUsage
          public static final String ENABLE_ACCESSIBILITY_GLOBAL_GESTURE_ENABLED =
                  "enable_accessibility_global_gesture_enabled";
  
          /**
           * Whether Airplane Mode is on.
           */
          public static final String AIRPLANE_MODE_ON = "airplane_mode_on";
  
          /**
           * Whether Theater Mode is on.
           * {@hide}
           */
          @SystemApi
          public static final String THEATER_MODE_ON = "theater_mode_on";
  
          /**
           * Constant for use in AIRPLANE_MODE_RADIOS to specify Bluetooth radio.
           */
          public static final String RADIO_BLUETOOTH = "bluetooth";
  
          /**
           * Constant for use in AIRPLANE_MODE_RADIOS to specify Wi-Fi radio.
           */
          public static final String RADIO_WIFI = "wifi";
  
          /**
           * {@hide}
           */
          public static final String RADIO_WIMAX = "wimax";
          /**
           * Constant for use in AIRPLANE_MODE_RADIOS to specify Cellular radio.
           */
          public static final String RADIO_CELL = "cell";
  
          /**
           * Constant for use in AIRPLANE_MODE_RADIOS to specify NFC radio.
           */
          public static final String RADIO_NFC = "nfc";
  
          /**
           * A comma separated list of radios that need to be disabled when airplane mode
           * is on. This overrides WIFI_ON and BLUETOOTH_ON, if Wi-Fi and bluetooth are
           * included in the comma separated list.
           */
          public static final String AIRPLANE_MODE_RADIOS = "airplane_mode_radios";
  
          /**
           * A comma separated list of radios that should to be disabled when airplane mode
           * is on, but can be manually reenabled by the user.  For example, if RADIO_WIFI is
           * added to both AIRPLANE_MODE_RADIOS and AIRPLANE_MODE_TOGGLEABLE_RADIOS, then Wifi
           * will be turned off when entering airplane mode, but the user will be able to reenable
           * Wifi in the Settings app.
           *
           * {@hide}
           */
          public static final String AIRPLANE_MODE_TOGGLEABLE_RADIOS = "airplane_mode_toggleable_radios";
  
          /**
           * An integer representing the Bluetooth Class of Device (CoD).
           *
           * @hide
           */
          public static final String BLUETOOTH_CLASS_OF_DEVICE = "bluetooth_class_of_device";
  
          /**
           * A Long representing a bitmap of profiles that should be disabled when bluetooth starts.
           * See {@link android.bluetooth.BluetoothProfile}.
           * {@hide}
           */
          public static final String BLUETOOTH_DISABLED_PROFILES = "bluetooth_disabled_profiles";
  
          /**
           * A semi-colon separated list of Bluetooth interoperability workarounds.
           * Each entry is a partial Bluetooth device address string and an integer representing
           * the feature to be disabled, separated by a comma. The integer must correspond
           * to a interoperability feature as defined in "interop.h" in /system/bt.
           * <p>
           * Example: <br/>
           *   "00:11:22,0;01:02:03:04,2"
           * @hide
           */
         public static final String BLUETOOTH_INTEROPERABILITY_LIST = "bluetooth_interoperability_list";
  
          /**
           * The policy for deciding when Wi-Fi should go to sleep (which will in
           * turn switch to using the mobile data as an Internet connection).
           * <p>
           * Set to one of {@link #WIFI_SLEEP_POLICY_DEFAULT},
           * {@link #WIFI_SLEEP_POLICY_NEVER_WHILE_PLUGGED}, or
           * {@link #WIFI_SLEEP_POLICY_NEVER}.
           */
          public static final String WIFI_SLEEP_POLICY = "wifi_sleep_policy";
  
          /**
           * Value for {@link #WIFI_SLEEP_POLICY} to use the default Wi-Fi sleep
           * policy, which is to sleep shortly after the turning off
           * according to the {@link #STAY_ON_WHILE_PLUGGED_IN} setting.
           */
          public static final int WIFI_SLEEP_POLICY_DEFAULT = 0;
  
          /**
           * Value for {@link #WIFI_SLEEP_POLICY} to use the default policy when
           * the device is on battery, and never go to sleep when the device is
           * plugged in.
           */
          public static final int WIFI_SLEEP_POLICY_NEVER_WHILE_PLUGGED = 1;
  
          /**
           * Value for {@link #WIFI_SLEEP_POLICY} to never go to sleep.
           */
          public static final int WIFI_SLEEP_POLICY_NEVER = 2;
  
          /**
           * Value to specify if the user prefers the date, time and time zone
           * to be automatically fetched from the network (NITZ). 1=yes, 0=no
           */
          public static final String AUTO_TIME = "auto_time";
  
          private static final Validator AUTO_TIME_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Value to specify if the user prefers the time zone
           * to be automatically fetched from the network (NITZ). 1=yes, 0=no
           */
          public static final String AUTO_TIME_ZONE = "auto_time_zone";
  
          private static final Validator AUTO_TIME_ZONE_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * URI for the car dock "in" event sound.
           * @hide
           */
          public static final String CAR_DOCK_SOUND = "car_dock_sound";
  
          /**
           * URI for the car dock "out" event sound.
           * @hide
           */
          public static final String CAR_UNDOCK_SOUND = "car_undock_sound";
  
          /**
           * URI for the desk dock "in" event sound.
           * @hide
           */
          public static final String DESK_DOCK_SOUND = "desk_dock_sound";
  
          /**
           * URI for the desk dock "out" event sound.
           * @hide
           */
          public static final String DESK_UNDOCK_SOUND = "desk_undock_sound";
  
          /**
           * Whether to play a sound for dock events.
           * @hide
           */
          public static final String DOCK_SOUNDS_ENABLED = "dock_sounds_enabled";
  
          private static final Validator DOCK_SOUNDS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether to play a sound for dock events, only when an accessibility service is on.
           * @hide
           */
          public static final String DOCK_SOUNDS_ENABLED_WHEN_ACCESSIBILITY = "dock_sounds_enabled_when_accessbility";
  
          /**
           * URI for the "device locked" (keyguard shown) sound.
           * @hide
           */
          public static final String LOCK_SOUND = "lock_sound";
  
          /**
           * URI for the "device unlocked" sound.
           * @hide
           */
          public static final String UNLOCK_SOUND = "unlock_sound";
  
          /**
           * URI for the "device is trusted" sound, which is played when the device enters the trusted
           * state without unlocking.
           * @hide
           */
          public static final String TRUSTED_SOUND = "trusted_sound";
  
          /**
           * URI for the low battery sound file.
           * @hide
           */
          public static final String LOW_BATTERY_SOUND = "low_battery_sound";
  
          /**
           * Whether to play a sound for low-battery alerts.
           * @hide
           */
          public static final String POWER_SOUNDS_ENABLED = "power_sounds_enabled";
  
          private static final Validator POWER_SOUNDS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * URI for the "wireless charging started" and "wired charging started" sound.
           * @hide
           */
          public static final String CHARGING_STARTED_SOUND =
                  "wireless_charging_started_sound";
  
          /**
           * Whether to play a sound for charging events.
           * @deprecated Use {@link android.provider.Settings.Secure#CHARGING_SOUNDS_ENABLED} instead
           * @hide
           */
          @Deprecated
          public static final String CHARGING_SOUNDS_ENABLED = "charging_sounds_enabled";
  
          private static final Validator CHARGING_SOUNDS_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether to vibrate for wireless charging events.
           * @deprecated Use {@link android.provider.Settings.Secure#CHARGING_VIBRATION_ENABLED}
           * @hide
           */
          @Deprecated
          public static final String CHARGING_VIBRATION_ENABLED = "charging_vibration_enabled";
  
          private static final Validator CHARGING_VIBRATION_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether we keep the device on while the device is plugged in.
           * Supported values are:
           * <ul>
           * <li>{@code 0} to never stay on while plugged in</li>
           * <li>{@link BatteryManager#BATTERY_PLUGGED_AC} to stay on for AC charger</li>
           * <li>{@link BatteryManager#BATTERY_PLUGGED_USB} to stay on for USB charger</li>
           * <li>{@link BatteryManager#BATTERY_PLUGGED_WIRELESS} to stay on for wireless charger</li>
           * </ul>
           * These values can be OR-ed together.
           */
          public static final String STAY_ON_WHILE_PLUGGED_IN = "stay_on_while_plugged_in";
  
          private static final Validator STAY_ON_WHILE_PLUGGED_IN_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  try {
                      int val = Integer.parseInt(value);
                      return (val == 0)
                              || (val == BatteryManager.BATTERY_PLUGGED_AC)
                              || (val == BatteryManager.BATTERY_PLUGGED_USB)
                              || (val == BatteryManager.BATTERY_PLUGGED_WIRELESS)
                              || (val == (BatteryManager.BATTERY_PLUGGED_AC
                                      | BatteryManager.BATTERY_PLUGGED_USB))
                              || (val == (BatteryManager.BATTERY_PLUGGED_AC
                                      | BatteryManager.BATTERY_PLUGGED_WIRELESS))
                              || (val == (BatteryManager.BATTERY_PLUGGED_USB
                                      | BatteryManager.BATTERY_PLUGGED_WIRELESS))
                              || (val == (BatteryManager.BATTERY_PLUGGED_AC
                                      | BatteryManager.BATTERY_PLUGGED_USB
                                      | BatteryManager.BATTERY_PLUGGED_WIRELESS));
                  } catch (NumberFormatException e) {
                      return false;
                  }
              }
          };
  
          /**
           * When the user has enable the option to have a "bug report" command
           * in the power menu.
           * @hide
           */
          public static final String BUGREPORT_IN_POWER_MENU = "bugreport_in_power_menu";
  
          private static final Validator BUGREPORT_IN_POWER_MENU_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Whether ADB is enabled.
           */
          public static final String ADB_ENABLED = "adb_enabled";
  
          /**
           * Whether Views are allowed to save their attribute data.
           * @hide
           */
          public static final String DEBUG_VIEW_ATTRIBUTES = "debug_view_attributes";
  
          /**
           * Which application package is allowed to save View attribute data.
           * @hide
           */
          public static final String DEBUG_VIEW_ATTRIBUTES_APPLICATION_PACKAGE =
                  "debug_view_attributes_application_package";
  
          /**
           * Whether assisted GPS should be enabled or not.
           * @hide
           */
          public static final String ASSISTED_GPS_ENABLED = "assisted_gps_enabled";
  
          /**
           * Whether bluetooth is enabled/disabled
           * 0=disabled. 1=enabled.
           */
          public static final String BLUETOOTH_ON = "bluetooth_on";
  
          private static final Validator BLUETOOTH_ON_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * CDMA Cell Broadcast SMS
           *                            0 = CDMA Cell Broadcast SMS disabled
           *                            1 = CDMA Cell Broadcast SMS enabled
           * @hide
           */
          public static final String CDMA_CELL_BROADCAST_SMS =
                  "cdma_cell_broadcast_sms";
  
          /**
           * The CDMA roaming mode 0 = Home Networks, CDMA default
           *                       1 = Roaming on Affiliated networks
           *                       2 = Roaming on any networks
           * @hide
           */
          public static final String CDMA_ROAMING_MODE = "roaming_settings";
  
          /**
           * The CDMA subscription mode 0 = RUIM/SIM (default)
           *                                1 = NV
           * @hide
           */
          public static final String CDMA_SUBSCRIPTION_MODE = "subscription_mode";
  
          /**
           * The default value for whether background data is enabled or not.
           *
           * Used by {@code NetworkPolicyManagerService}.
           *
           * @hide
           */
          public static final String DEFAULT_RESTRICT_BACKGROUND_DATA =
                  "default_restrict_background_data";
  
          /** Inactivity timeout to track mobile data activity.
          *
          * If set to a positive integer, it indicates the inactivity timeout value in seconds to
          * infer the data activity of mobile network. After a period of no activity on mobile
          * networks with length specified by the timeout, an {@code ACTION_DATA_ACTIVITY_CHANGE}
          * intent is fired to indicate a transition of network status from "active" to "idle". Any
          * subsequent activity on mobile networks triggers the firing of {@code
          * ACTION_DATA_ACTIVITY_CHANGE} intent indicating transition from "idle" to "active".
          *
          * Network activity refers to transmitting or receiving data on the network interfaces.
          *
          * Tracking is disabled if set to zero or negative value.
          *
          * @hide
          */
         public static final String DATA_ACTIVITY_TIMEOUT_MOBILE = "data_activity_timeout_mobile";
  
         /** Timeout to tracking Wifi data activity. Same as {@code DATA_ACTIVITY_TIMEOUT_MOBILE}
          * but for Wifi network.
          * @hide
          */
         public static final String DATA_ACTIVITY_TIMEOUT_WIFI = "data_activity_timeout_wifi";
  
         /**
          * Whether or not data roaming is enabled. (0 = false, 1 = true)
          */
         public static final String DATA_ROAMING = "data_roaming";
  
         /**
          * The value passed to a Mobile DataConnection via bringUp which defines the
          * number of retries to preform when setting up the initial connection. The default
          * value defined in DataConnectionTrackerBase#DEFAULT_MDC_INITIAL_RETRY is currently 1.
          * @hide
          */
         public static final String MDC_INITIAL_MAX_RETRY = "mdc_initial_max_retry";
  
         /**
          * Whether any package can be on external storage. When this is true, any
          * package, regardless of manifest values, is a candidate for installing
          * or moving onto external storage. (0 = false, 1 = true)
          * @hide
          */
         public static final String FORCE_ALLOW_ON_EXTERNAL = "force_allow_on_external";
  
          /**
           * The default SM-DP+ configured for this device.
           *
           * <p>An SM-DP+ is used by an LPA (see {@link android.service.euicc.EuiccService}) to
           * download profiles. If this value is set, the LPA will query this server for any profiles
           * available to this device. If any are available, they may be downloaded during device
           * provisioning or in settings without needing the user to enter an activation code.
           *
           * @see android.service.euicc.EuiccService
           * @hide
           */
          @SystemApi
          public static final String DEFAULT_SM_DP_PLUS = "default_sm_dp_plus";
  
          /**
           * Whether any profile has ever been downloaded onto a eUICC on the device.
           *
           * <p>Used to hide eUICC UI from users who have never made use of it and would only be
           * confused by seeing references to it in settings.
           * (0 = false, 1 = true)
           * @hide
           */
          @SystemApi
          public static final String EUICC_PROVISIONED = "euicc_provisioned";
  
          /**
           * List of ISO country codes in which eUICC UI is shown. Country codes should be separated
           * by comma.
           *
           * Note: if {@link #EUICC_SUPPORTED_COUNTRIES} is empty, then {@link
           * #EUICC_UNSUPPORTED_COUNTRIES} is used.
           *
           * <p>Used to hide eUICC UI from users who are currently in countries where no carriers
           * support eUICC.
           *
           * @hide
           */
          //TODO(b/77914569) Changes this to System Api.
          public static final String EUICC_SUPPORTED_COUNTRIES = "euicc_supported_countries";
  
          /**
           * List of ISO country codes in which eUICC UI is not shown. Country codes should be
           * separated by comma.
           *
           * Note: if {@link #EUICC_SUPPORTED_COUNTRIES} is empty, then {@link
           * #EUICC_UNSUPPORTED_COUNTRIES} is used.
           *
           * <p>Used to hide eUICC UI from users who are currently in countries where no carriers
           * support eUICC.
           *
           * @hide
           */
          //TODO(b/77914569) Changes this to System Api.
          public static final String EUICC_UNSUPPORTED_COUNTRIES = "euicc_unsupported_countries";
          private static final Validator EUICC_UNSUPPORTED_COUNTRIES_VALIDATOR =
                  new SettingsValidators.ComponentNameListValidator(",");
  
          /**
           * Whether any activity can be resized. When this is true, any
           * activity, regardless of manifest values, can be resized for multi-window.
           * (0 = false, 1 = true)
           * @hide
           */
          public static final String DEVELOPMENT_FORCE_RESIZABLE_ACTIVITIES
                  = "force_resizable_activities";
  
          /**
           * Whether to enable experimental freeform support for windows.
           * @hide
           */
          public static final String DEVELOPMENT_ENABLE_FREEFORM_WINDOWS_SUPPORT
                  = "enable_freeform_support";
  
          /**
           * Whether to enable experimental desktop mode on secondary displays.
           * @hide
           */
          public static final String DEVELOPMENT_FORCE_DESKTOP_MODE_ON_EXTERNAL_DISPLAYS =
                  "force_desktop_mode_on_external_displays";
  
         /**
          * Whether user has enabled development settings.
          */
         public static final String DEVELOPMENT_SETTINGS_ENABLED = "development_settings_enabled";
  
         /**
          * Whether the device has been provisioned (0 = false, 1 = true).
          * <p>On a multiuser device with a separate system user, the screen may be locked
          * as soon as this is set to true and further activities cannot be launched on the
          * system user unless they are marked to show over keyguard.
          */
         public static final String DEVICE_PROVISIONED = "device_provisioned";
  
          /**
           * Indicates whether mobile data should be allowed while the device is being provisioned.
           * This allows the provisioning process to turn off mobile data before the user
           * has an opportunity to set things up, preventing other processes from burning
           * precious bytes before wifi is setup.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          public static final String DEVICE_PROVISIONING_MOBILE_DATA_ENABLED =
                  "device_provisioning_mobile_data";
  
         /**
          * The saved value for WindowManagerService.setForcedDisplaySize().
          * Two integers separated by a comma.  If unset, then use the real display size.
          * @hide
          */
         public static final String DISPLAY_SIZE_FORCED = "display_size_forced";
  
         /**
          * The saved value for WindowManagerService.setForcedDisplayScalingMode().
          * 0 or unset if scaling is automatic, 1 if scaling is disabled.
          * @hide
          */
         public static final String DISPLAY_SCALING_FORCE = "display_scaling_force";
  
         /**
          * The maximum size, in bytes, of a download that the download manager will transfer over
          * a non-wifi connection.
          * @hide
          */
         public static final String DOWNLOAD_MAX_BYTES_OVER_MOBILE =
                 "download_manager_max_bytes_over_mobile";
  
         /**
          * The recommended maximum size, in bytes, of a download that the download manager should
          * transfer over a non-wifi connection. Over this size, the use will be warned, but will
          * have the option to start the download over the mobile connection anyway.
          * @hide
          */
         public static final String DOWNLOAD_RECOMMENDED_MAX_BYTES_OVER_MOBILE =
                 "download_manager_recommended_max_bytes_over_mobile";
  
         /**
          * @deprecated Use {@link android.provider.Settings.Secure#INSTALL_NON_MARKET_APPS} instead
          */
         @Deprecated
         public static final String INSTALL_NON_MARKET_APPS = Secure.INSTALL_NON_MARKET_APPS;
  
         /**
          * Whether HDMI control shall be enabled. If disabled, no CEC/MHL command will be
          * sent or processed. (0 = false, 1 = true)
          * @hide
          */
         public static final String HDMI_CONTROL_ENABLED = "hdmi_control_enabled";
  
         /**
          * Whether HDMI System Audio Control feature is enabled. If enabled, TV will try to turn on
          * system audio mode if there's a connected CEC-enabled AV Receiver. Then audio stream will
          * be played on AVR instead of TV spaeker. If disabled, the system audio mode will never be
          * activated.
          * @hide
          */
          public static final String HDMI_SYSTEM_AUDIO_CONTROL_ENABLED =
                  "hdmi_system_audio_control_enabled";
  
          /**
           * Whether HDMI Routing Control feature is enabled. If enabled, the switch device will
           * route to the correct input source on receiving Routing Control related messages. If
           * disabled, you can only switch the input via controls on this device.
           * @hide
           */
          public static final String HDMI_CEC_SWITCH_ENABLED =
                  "hdmi_cec_switch_enabled";
  
          /**
           * Whether TV will automatically turn on upon reception of the CEC command
           * &lt;Text View On&gt; or &lt;Image View On&gt;. (0 = false, 1 = true)
           *
           * @hide
           */
          public static final String HDMI_CONTROL_AUTO_WAKEUP_ENABLED =
                  "hdmi_control_auto_wakeup_enabled";
  
          /**
           * Whether TV will also turn off other CEC devices when it goes to standby mode.
           * (0 = false, 1 = true)
           *
           * @hide
           */
          public static final String HDMI_CONTROL_AUTO_DEVICE_OFF_ENABLED =
                  "hdmi_control_auto_device_off_enabled";
  
          /**
           * The interval in milliseconds at which location requests will be throttled when they are
           * coming from the background.
           *
           * @hide
           */
          public static final String LOCATION_BACKGROUND_THROTTLE_INTERVAL_MS =
                  "location_background_throttle_interval_ms";
  
          /**
           * Most frequent location update interval in milliseconds that proximity alert is allowed
           * to request.
           * @hide
           */
          public static final String LOCATION_BACKGROUND_THROTTLE_PROXIMITY_ALERT_INTERVAL_MS =
                  "location_background_throttle_proximity_alert_interval_ms";
  
          /**
           * Packages that are whitelisted for background throttling (throttling will not be applied).
           * @hide
           */
          public static final String LOCATION_BACKGROUND_THROTTLE_PACKAGE_WHITELIST =
              "location_background_throttle_package_whitelist";
  
          /**
           * Packages that are whitelisted for ignoring location settings (may retrieve location even
           * when user location settings are off), for emergency purposes.
           * @hide
           */
          @TestApi
          public static final String LOCATION_IGNORE_SETTINGS_PACKAGE_WHITELIST =
                  "location_ignore_settings_package_whitelist";
  
          /**
           * Whether to disable location status callbacks in preparation for deprecation.
           * @hide
           */
          public static final String LOCATION_DISABLE_STATUS_CALLBACKS =
                  "location_disable_status_callbacks";
  
          /**
           * Maximum staleness allowed for last location when returned to clients with only foreground
           * location permissions.
           * @hide
           */
          public static final String LOCATION_LAST_LOCATION_MAX_AGE_MILLIS =
                  "location_last_location_max_age_millis";
  
          /**
          * Whether TV will switch to MHL port when a mobile device is plugged in.
          * (0 = false, 1 = true)
          * @hide
          */
         public static final String MHL_INPUT_SWITCHING_ENABLED = "mhl_input_switching_enabled";
  
         /**
          * Whether TV will charge the mobile device connected at MHL port. (0 = false, 1 = true)
          * @hide
          */
         public static final String MHL_POWER_CHARGE_ENABLED = "mhl_power_charge_enabled";
  
         /**
          * Whether mobile data connections are allowed by the user.  See
          * ConnectivityManager for more info.
          * @hide
          */
         @UnsupportedAppUsage
         public static final String MOBILE_DATA = "mobile_data";
  
         /**
          * Whether the mobile data connection should remain active even when higher
          * priority networks like WiFi are active, to help make network switching faster.
          *
          * See ConnectivityService for more info.
          *
          * (0 = disabled, 1 = enabled)
          * @hide
          */
         public static final String MOBILE_DATA_ALWAYS_ON = "mobile_data_always_on";
  
          /**
           * Whether the wifi data connection should remain active even when higher
           * priority networks like Ethernet are active, to keep both networks.
           * In the case where higher priority networks are connected, wifi will be
           * unused unless an application explicitly requests to use it.
           *
           * See ConnectivityService for more info.
           *
           * (0 = disabled, 1 = enabled)
           * @hide
           */
          public static final String WIFI_ALWAYS_REQUESTED = "wifi_always_requested";
  
          /**
           * Size of the event buffer for IP connectivity metrics.
           * @hide
           */
          public static final String CONNECTIVITY_METRICS_BUFFER_SIZE =
                "connectivity_metrics_buffer_size";
  
         /** {@hide} */
         public static final String NETSTATS_ENABLED = "netstats_enabled";
         /** {@hide} */
         public static final String NETSTATS_POLL_INTERVAL = "netstats_poll_interval";
         /** {@hide} */
         @Deprecated
         public static final String NETSTATS_TIME_CACHE_MAX_AGE = "netstats_time_cache_max_age";
         /** {@hide} */
         public static final String NETSTATS_GLOBAL_ALERT_BYTES = "netstats_global_alert_bytes";
         /** {@hide} */
         public static final String NETSTATS_SAMPLE_ENABLED = "netstats_sample_enabled";
         /** {@hide} */
         public static final String NETSTATS_AUGMENT_ENABLED = "netstats_augment_enabled";
  
         /** {@hide} */
         public static final String NETSTATS_DEV_BUCKET_DURATION = "netstats_dev_bucket_duration";
         /** {@hide} */
         public static final String NETSTATS_DEV_PERSIST_BYTES = "netstats_dev_persist_bytes";
         /** {@hide} */
         public static final String NETSTATS_DEV_ROTATE_AGE = "netstats_dev_rotate_age";
         /** {@hide} */
         public static final String NETSTATS_DEV_DELETE_AGE = "netstats_dev_delete_age";
  
         /** {@hide} */
         public static final String NETSTATS_UID_BUCKET_DURATION = "netstats_uid_bucket_duration";
         /** {@hide} */
         public static final String NETSTATS_UID_PERSIST_BYTES = "netstats_uid_persist_bytes";
         /** {@hide} */
         public static final String NETSTATS_UID_ROTATE_AGE = "netstats_uid_rotate_age";
         /** {@hide} */
         public static final String NETSTATS_UID_DELETE_AGE = "netstats_uid_delete_age";
  
         /** {@hide} */
         public static final String NETSTATS_UID_TAG_BUCKET_DURATION = "netstats_uid_tag_bucket_duration";
         /** {@hide} */
         public static final String NETSTATS_UID_TAG_PERSIST_BYTES = "netstats_uid_tag_persist_bytes";
         /** {@hide} */
         public static final String NETSTATS_UID_TAG_ROTATE_AGE = "netstats_uid_tag_rotate_age";
         /** {@hide} */
         public static final String NETSTATS_UID_TAG_DELETE_AGE = "netstats_uid_tag_delete_age";
  
         /** {@hide} */
         public static final String NETPOLICY_QUOTA_ENABLED = "netpolicy_quota_enabled";
         /** {@hide} */
         public static final String NETPOLICY_QUOTA_UNLIMITED = "netpolicy_quota_unlimited";
         /** {@hide} */
         public static final String NETPOLICY_QUOTA_LIMITED = "netpolicy_quota_limited";
         /** {@hide} */
         public static final String NETPOLICY_QUOTA_FRAC_JOBS = "netpolicy_quota_frac_jobs";
         /** {@hide} */
         public static final String NETPOLICY_QUOTA_FRAC_MULTIPATH = "netpolicy_quota_frac_multipath";
  
         /** {@hide} */
         public static final String NETPOLICY_OVERRIDE_ENABLED = "netpolicy_override_enabled";
  
         /**
          * User preference for which network(s) should be used. Only the
          * connectivity service should touch this.
          */
         public static final String NETWORK_PREFERENCE = "network_preference";
  
         /**
          * Which package name to use for network scoring. If null, or if the package is not a valid
          * scorer app, external network scores will neither be requested nor accepted.
          * @hide
          */
         @UnsupportedAppUsage
         public static final String NETWORK_SCORER_APP = "network_scorer_app";
  
          /**
           * Whether night display forced auto mode is available.
           * 0 = unavailable, 1 = available.
           * @hide
           */
          public static final String NIGHT_DISPLAY_FORCED_AUTO_MODE_AVAILABLE =
                  "night_display_forced_auto_mode_available";
  
         /**
          * If the NITZ_UPDATE_DIFF time is exceeded then an automatic adjustment
          * to SystemClock will be allowed even if NITZ_UPDATE_SPACING has not been
          * exceeded.
          * @hide
          */
         public static final String NITZ_UPDATE_DIFF = "nitz_update_diff";
  
         /**
          * The length of time in milli-seconds that automatic small adjustments to
          * SystemClock are ignored if NITZ_UPDATE_DIFF is not exceeded.
          * @hide
          */
         public static final String NITZ_UPDATE_SPACING = "nitz_update_spacing";
  
         /** Preferred NTP server. {@hide} */
         public static final String NTP_SERVER = "ntp_server";
         /** Timeout in milliseconds to wait for NTP server. {@hide} */
         public static final String NTP_TIMEOUT = "ntp_timeout";
  
         /** {@hide} */
         public static final String STORAGE_BENCHMARK_INTERVAL = "storage_benchmark_interval";
  
          /**
           * Whether or not Settings should enable psd API.
           * {@hide}
           */
          public static final String SETTINGS_USE_PSD_API = "settings_use_psd_api";
  
          /**
           * Whether or not Settings should enable external provider API.
           * {@hide}
           */
          public static final String SETTINGS_USE_EXTERNAL_PROVIDER_API =
                  "settings_use_external_provider_api";
  
         /**
          * Sample validity in seconds to configure for the system DNS resolver.
          * {@hide}
          */
         public static final String DNS_RESOLVER_SAMPLE_VALIDITY_SECONDS =
                 "dns_resolver_sample_validity_seconds";
  
         /**
          * Success threshold in percent for use with the system DNS resolver.
          * {@hide}
          */
         public static final String DNS_RESOLVER_SUCCESS_THRESHOLD_PERCENT =
                  "dns_resolver_success_threshold_percent";
  
         /**
          * Minimum number of samples needed for statistics to be considered meaningful in the
          * system DNS resolver.
          * {@hide}
          */
         public static final String DNS_RESOLVER_MIN_SAMPLES = "dns_resolver_min_samples";
  
         /**
          * Maximum number taken into account for statistics purposes in the system DNS resolver.
          * {@hide}
          */
         public static final String DNS_RESOLVER_MAX_SAMPLES = "dns_resolver_max_samples";
  
         /**
          * Whether to disable the automatic scheduling of system updates.
          * 1 = system updates won't be automatically scheduled (will always
          * present notification instead).
          * 0 = system updates will be automatically scheduled. (default)
          * @hide
          */
         @SystemApi
         public static final String OTA_DISABLE_AUTOMATIC_UPDATE = "ota_disable_automatic_update";
  
         /**
          * Whether the package manager should send package verification broadcasts for verifiers to
          * review apps prior to installation.
          * 1 = request apps to be verified prior to installation, if a verifier exists.
          * 0 = do not verify apps before installation
          * @hide
          */
         @UnsupportedAppUsage
         public static final String PACKAGE_VERIFIER_ENABLE = "package_verifier_enable";
  
         /** Timeout for package verification.
          * @hide */
         public static final String PACKAGE_VERIFIER_TIMEOUT = "verifier_timeout";
  
         /** Default response code for package verification.
          * @hide */
         public static final String PACKAGE_VERIFIER_DEFAULT_RESPONSE = "verifier_default_response";
  
         /**
          * Show package verification setting in the Settings app.
          * 1 = show (default)
          * 0 = hide
          * @hide
          */
         public static final String PACKAGE_VERIFIER_SETTING_VISIBLE = "verifier_setting_visible";
  
         /**
          * Run package verification on apps installed through ADB/ADT/USB
          * 1 = perform package verification on ADB installs (default)
          * 0 = bypass package verification on ADB installs
          * @hide
          */
         public static final String PACKAGE_VERIFIER_INCLUDE_ADB = "verifier_verify_adb_installs";
  
         /**
          * Time since last fstrim (milliseconds) after which we force one to happen
          * during device startup.  If unset, the default is 3 days.
          * @hide
          */
         public static final String FSTRIM_MANDATORY_INTERVAL = "fstrim_mandatory_interval";
  
         /**
          * The interval in milliseconds at which to check packet counts on the
          * mobile data interface when screen is on, to detect possible data
          * connection problems.
          * @hide
          */
         public static final String PDP_WATCHDOG_POLL_INTERVAL_MS =
                 "pdp_watchdog_poll_interval_ms";
  
         /**
          * The interval in milliseconds at which to check packet counts on the
          * mobile data interface when screen is off, to detect possible data
          * connection problems.
          * @hide
          */
         public static final String PDP_WATCHDOG_LONG_POLL_INTERVAL_MS =
                 "pdp_watchdog_long_poll_interval_ms";
  
         /**
          * The interval in milliseconds at which to check packet counts on the
          * mobile data interface after {@link #PDP_WATCHDOG_TRIGGER_PACKET_COUNT}
          * outgoing packets has been reached without incoming packets.
          * @hide
          */
         public static final String PDP_WATCHDOG_ERROR_POLL_INTERVAL_MS =
                 "pdp_watchdog_error_poll_interval_ms";
  
         /**
          * The number of outgoing packets sent without seeing an incoming packet
          * that triggers a countdown (of {@link #PDP_WATCHDOG_ERROR_POLL_COUNT}
          * device is logged to the event log
          * @hide
          */
         public static final String PDP_WATCHDOG_TRIGGER_PACKET_COUNT =
                 "pdp_watchdog_trigger_packet_count";
  
         /**
          * The number of polls to perform (at {@link #PDP_WATCHDOG_ERROR_POLL_INTERVAL_MS})
          * after hitting {@link #PDP_WATCHDOG_TRIGGER_PACKET_COUNT} before
          * attempting data connection recovery.
          * @hide
          */
         public static final String PDP_WATCHDOG_ERROR_POLL_COUNT =
                 "pdp_watchdog_error_poll_count";
  
         /**
          * The number of failed PDP reset attempts before moving to something more
          * drastic: re-registering to the network.
          * @hide
          */
         public static final String PDP_WATCHDOG_MAX_PDP_RESET_FAIL_COUNT =
                 "pdp_watchdog_max_pdp_reset_fail_count";
  
         /**
          * URL to open browser on to allow user to manage a prepay account
          * @hide
          */
         public static final String SETUP_PREPAID_DATA_SERVICE_URL =
                 "setup_prepaid_data_service_url";
  
         /**
          * URL to attempt a GET on to see if this is a prepay device
          * @hide
          */
         public static final String SETUP_PREPAID_DETECTION_TARGET_URL =
                 "setup_prepaid_detection_target_url";
  
         /**
          * Host to check for a redirect to after an attempt to GET
          * SETUP_PREPAID_DETECTION_TARGET_URL. (If we redirected there,
          * this is a prepaid device with zero balance.)
          * @hide
          */
         public static final String SETUP_PREPAID_DETECTION_REDIR_HOST =
                 "setup_prepaid_detection_redir_host";
  
         /**
          * The interval in milliseconds at which to check the number of SMS sent out without asking
          * for use permit, to limit the un-authorized SMS usage.
          *
          * @hide
          */
         public static final String SMS_OUTGOING_CHECK_INTERVAL_MS =
                 "sms_outgoing_check_interval_ms";
  
         /**
          * The number of outgoing SMS sent without asking for user permit (of {@link
          * #SMS_OUTGOING_CHECK_INTERVAL_MS}
          *
          * @hide
          */
         public static final String SMS_OUTGOING_CHECK_MAX_COUNT =
                 "sms_outgoing_check_max_count";
  
         /**
          * Used to disable SMS short code confirmation - defaults to true.
          * True indcates we will do the check, etc.  Set to false to disable.
          * @see com.android.internal.telephony.SmsUsageMonitor
          * @hide
          */
         public static final String SMS_SHORT_CODE_CONFIRMATION = "sms_short_code_confirmation";
  
          /**
           * Used to select which country we use to determine premium sms codes.
           * One of com.android.internal.telephony.SMSDispatcher.PREMIUM_RULE_USE_SIM,
           * com.android.internal.telephony.SMSDispatcher.PREMIUM_RULE_USE_NETWORK,
           * or com.android.internal.telephony.SMSDispatcher.PREMIUM_RULE_USE_BOTH.
           * @hide
           */
          public static final String SMS_SHORT_CODE_RULE = "sms_short_code_rule";
  
         /**
          * Used to select TCP's default initial receiver window size in segments - defaults to a build config value
          * @hide
          */
         public static final String TCP_DEFAULT_INIT_RWND = "tcp_default_init_rwnd";
  
         /**
          * Used to disable Tethering on a device - defaults to true
          * @hide
          */
         public static final String TETHER_SUPPORTED = "tether_supported";
  
         /**
          * Used to require DUN APN on the device or not - defaults to a build config value
          * which defaults to false
          * @hide
          */
         public static final String TETHER_DUN_REQUIRED = "tether_dun_required";
  
         /**
          * Used to hold a gservices-provisioned apn value for DUN.  If set, or the
          * corresponding build config values are set it will override the APN DB
          * values.
          * Consists of a comma seperated list of strings:
          * "name,apn,proxy,port,username,password,server,mmsc,mmsproxy,mmsport,mcc,mnc,auth,type"
          * note that empty fields can be omitted: "name,apn,,,,,,,,,310,260,,DUN"
          * @hide
          */
         public static final String TETHER_DUN_APN = "tether_dun_apn";
  
          /**
           * Used to disable trying to talk to any available tethering offload HAL.
           *
           * Integer values are interpreted as boolean, and the absence of an explicit setting
           * is interpreted as |false|.
           * @hide
           */
          public static final String TETHER_OFFLOAD_DISABLED = "tether_offload_disabled";
  
          /**
           * Use the old dnsmasq DHCP server for tethering instead of the framework implementation.
           *
           * Integer values are interpreted as boolean, and the absence of an explicit setting
           * is interpreted as |false|.
           * @hide
           */
          public static final String TETHER_ENABLE_LEGACY_DHCP_SERVER =
                  "tether_enable_legacy_dhcp_server";
  
          /**
           * List of certificate (hex string representation of the application's certificate - SHA-1
           * or SHA-256) and carrier app package pairs which are whitelisted to prompt the user for
           * install when a sim card with matching UICC carrier privilege rules is inserted.  The
           * certificate is used as a key, so the certificate encoding here must be the same as the
           * certificate encoding used on the SIM.
           *
           * The value is "cert1:package1;cert2:package2;..."
           * @hide
           */
          @SystemApi
          public static final String CARRIER_APP_WHITELIST = "carrier_app_whitelist";
  
          /**
           * Map of package name to application names. The application names cannot and will not be
           * localized. App names may not contain colons or semicolons.
           *
           * The value is "packageName1:appName1;packageName2:appName2;..."
           * @hide
           */
          @SystemApi
          public static final String CARRIER_APP_NAMES = "carrier_app_names";
  
         /**
          * USB Mass Storage Enabled
          */
         public static final String USB_MASS_STORAGE_ENABLED = "usb_mass_storage_enabled";
  
         private static final Validator USB_MASS_STORAGE_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
         /**
          * If this setting is set (to anything), then all references
          * to Gmail on the device must change to Google Mail.
          */
         public static final String USE_GOOGLE_MAIL = "use_google_mail";
  
          /**
           * Whether or not switching/creating users is enabled by user.
           * @hide
           */
          public static final String USER_SWITCHER_ENABLED = "user_switcher_enabled";
  
          /**
           * Webview Data reduction proxy key.
           * @hide
           */
          public static final String WEBVIEW_DATA_REDUCTION_PROXY_KEY =
                  "webview_data_reduction_proxy_key";
  
         /**
          * Whether or not the WebView fallback mechanism should be enabled.
          * 0=disabled, 1=enabled.
          * @hide
          */
         public static final String WEBVIEW_FALLBACK_LOGIC_ENABLED =
                 "webview_fallback_logic_enabled";
  
         /**
          * Name of the package used as WebView provider (if unset the provider is instead determined
          * by the system).
          * @hide
          */
         @UnsupportedAppUsage
         public static final String WEBVIEW_PROVIDER = "webview_provider";
  
         /**
          * Developer setting to enable WebView multiprocess rendering.
          * @hide
          */
         @SystemApi
         public static final String WEBVIEW_MULTIPROCESS = "webview_multiprocess";
  
         /**
          * The maximum number of notifications shown in 24 hours when switching networks.
          * @hide
          */
         public static final String NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT =
                "network_switch_notification_daily_limit";
  
         /**
          * The minimum time in milliseconds between notifications when switching networks.
          * @hide
          */
         public static final String NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS =
                "network_switch_notification_rate_limit_millis";
  
         /**
          * Whether to automatically switch away from wifi networks that lose Internet access.
          * Only meaningful if config_networkAvoidBadWifi is set to 0, otherwise the system always
          * avoids such networks. Valid values are:
          *
          * 0: Don't avoid bad wifi, don't prompt the user. Get stuck on bad wifi like it's 2013.
          * null: Ask the user whether to switch away from bad wifi.
          * 1: Avoid bad wifi.
          *
          * @hide
          */
         public static final String NETWORK_AVOID_BAD_WIFI = "network_avoid_bad_wifi";
  
         /**
          * User setting for ConnectivityManager.getMeteredMultipathPreference(). This value may be
          * overridden by the system based on device or application state. If null, the value
          * specified by config_networkMeteredMultipathPreference is used.
          *
          * @hide
          */
         public static final String NETWORK_METERED_MULTIPATH_PREFERENCE =
                 "network_metered_multipath_preference";
  
          /**
           * Default daily multipath budget used by ConnectivityManager.getMultipathPreference()
           * on metered networks. This default quota is only used if quota could not be determined
           * from data plan or data limit/warning set by the user.
           * @hide
           */
          public static final String NETWORK_DEFAULT_DAILY_MULTIPATH_QUOTA_BYTES =
                  "network_default_daily_multipath_quota_bytes";
  
          /**
           * Network watchlist last report time.
           * @hide
           */
          public static final String NETWORK_WATCHLIST_LAST_REPORT_TIME =
                  "network_watchlist_last_report_time";
  
         /**
          * The thresholds of the wifi throughput badging (SD, HD etc.) as a comma-delimited list of
          * colon-delimited key-value pairs. The key is the badging enum value defined in
          * android.net.ScoredNetwork and the value is the minimum sustained network throughput in
          * kbps required for the badge. For example: "10:3000,20:5000,30:25000"
          *
          * @hide
          */
         @SystemApi
         public static final String WIFI_BADGING_THRESHOLDS = "wifi_badging_thresholds";
  
         /**
          * Whether Wifi display is enabled/disabled
          * 0=disabled. 1=enabled.
          * @hide
          */
         public static final String WIFI_DISPLAY_ON = "wifi_display_on";
  
         /**
          * Whether Wifi display certification mode is enabled/disabled
          * 0=disabled. 1=enabled.
          * @hide
          */
         public static final String WIFI_DISPLAY_CERTIFICATION_ON =
                 "wifi_display_certification_on";
  
         /**
          * WPS Configuration method used by Wifi display, this setting only
          * takes effect when WIFI_DISPLAY_CERTIFICATION_ON is 1 (enabled).
          *
          * Possible values are:
          *
          * WpsInfo.INVALID: use default WPS method chosen by framework
          * WpsInfo.PBC    : use Push button
          * WpsInfo.KEYPAD : use Keypad
          * WpsInfo.DISPLAY: use Display
          * @hide
          */
         public static final String WIFI_DISPLAY_WPS_CONFIG =
             "wifi_display_wps_config";
  
         /**
          * Whether to notify the user of open networks.
          * <p>
          * If not connected and the scan results have an open network, we will
          * put this notification up. If we attempt to connect to a network or
          * the open network(s) disappear, we remove the notification. When we
          * show the notification, we will not show it again for
          * {@link android.provider.Settings.Secure#WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY} time.
          *
          * @deprecated This feature is no longer controlled by this setting in
          * {@link android.os.Build.VERSION_CODES#O}.
          */
         @Deprecated
         public static final String WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON =
                 "wifi_networks_available_notification_on";
  
         private static final Validator WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON_VALIDATOR =
                 BOOLEAN_VALIDATOR;
  
         /**
          * Whether to notify the user of carrier networks.
          * <p>
          * If not connected and the scan results have a carrier network, we will
          * put this notification up. If we attempt to connect to a network or
          * the carrier network(s) disappear, we remove the notification. When we
          * show the notification, we will not show it again for
          * {@link android.provider.Settings.Global#WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY} time.
          * @hide
          */
         public static final String WIFI_CARRIER_NETWORKS_AVAILABLE_NOTIFICATION_ON =
                 "wifi_carrier_networks_available_notification_on";
  
         private static final Validator WIFI_CARRIER_NETWORKS_AVAILABLE_NOTIFICATION_ON_VALIDATOR =
                 BOOLEAN_VALIDATOR;
  
         /**
          * {@hide}
          */
         public static final String WIMAX_NETWORKS_AVAILABLE_NOTIFICATION_ON =
                 "wimax_networks_available_notification_on";
  
         /**
          * Delay (in seconds) before repeating the Wi-Fi networks available notification.
          * Connecting to a network will reset the timer.
          */
         public static final String WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY =
                 "wifi_networks_available_repeat_delay";
  
         private static final Validator WIFI_NETWORKS_AVAILABLE_REPEAT_DELAY_VALIDATOR =
                 NON_NEGATIVE_INTEGER_VALIDATOR;
  
         /**
          * 802.11 country code in ISO 3166 format
          * @hide
          */
         public static final String WIFI_COUNTRY_CODE = "wifi_country_code";
  
         /**
          * The interval in milliseconds to issue wake up scans when wifi needs
          * to connect. This is necessary to connect to an access point when
          * device is on the move and the screen is off.
          * @hide
          */
         public static final String WIFI_FRAMEWORK_SCAN_INTERVAL_MS =
                 "wifi_framework_scan_interval_ms";
  
         /**
          * The interval in milliseconds after which Wi-Fi is considered idle.
          * When idle, it is possible for the device to be switched from Wi-Fi to
          * the mobile data network.
          * @hide
          */
         public static final String WIFI_IDLE_MS = "wifi_idle_ms";
  
         /**
          * When the number of open networks exceeds this number, the
          * least-recently-used excess networks will be removed.
          */
         public static final String WIFI_NUM_OPEN_NETWORKS_KEPT = "wifi_num_open_networks_kept";
  
         private static final Validator WIFI_NUM_OPEN_NETWORKS_KEPT_VALIDATOR =
                 NON_NEGATIVE_INTEGER_VALIDATOR;
  
         /**
          * Whether the Wi-Fi should be on.  Only the Wi-Fi service should touch this.
          */
         public static final String WIFI_ON = "wifi_on";
  
         /**
          * Setting to allow scans to be enabled even wifi is turned off for connectivity.
          * @hide
          */
         public static final String WIFI_SCAN_ALWAYS_AVAILABLE =
                  "wifi_scan_always_enabled";
  
          /**
           * The interval in milliseconds at which wifi rtt ranging requests will be throttled when
           * they are coming from the background.
           *
           * @hide
           */
          public static final String WIFI_RTT_BACKGROUND_EXEC_GAP_MS =
                  "wifi_rtt_background_exec_gap_ms";
  
          /**
           * Indicate whether factory reset request is pending.
           *
           * Type: int (0 for false, 1 for true)
           * @hide
           */
          public static final String WIFI_P2P_PENDING_FACTORY_RESET =
                  "wifi_p2p_pending_factory_reset";
  
          /**
           * Whether soft AP will shut down after a timeout period when no devices are connected.
           *
           * Type: int (0 for false, 1 for true)
           * @hide
           */
          public static final String SOFT_AP_TIMEOUT_ENABLED = "soft_ap_timeout_enabled";
  
          private static final Validator SOFT_AP_TIMEOUT_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Value to specify if Wi-Fi Wakeup feature is enabled.
           *
           * Type: int (0 for false, 1 for true)
           * @hide
           */
          @SystemApi
          public static final String WIFI_WAKEUP_ENABLED = "wifi_wakeup_enabled";
  
          private static final Validator WIFI_WAKEUP_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Value to specify whether network quality scores and badging should be shown in the UI.
           *
           * Type: int (0 for false, 1 for true)
           * @hide
           */
          public static final String NETWORK_SCORING_UI_ENABLED = "network_scoring_ui_enabled";
  
          /**
           * Value to specify how long in milliseconds to retain seen score cache curves to be used
           * when generating SSID only bases score curves.
           *
           * Type: long
           * @hide
           */
          public static final String SPEED_LABEL_CACHE_EVICTION_AGE_MILLIS =
                  "speed_label_cache_eviction_age_millis";
  
          /**
           * Value to specify if network recommendations from
           * {@link com.android.server.NetworkScoreService} are enabled.
           *
           * Type: int
           * Valid values:
           *   -1 = Forced off
           *    0 = Disabled
           *    1 = Enabled
           *
           * Most readers of this setting should simply check if value == 1 to determined the
           * enabled state.
           * @hide
           */
          public static final String NETWORK_RECOMMENDATIONS_ENABLED =
                  "network_recommendations_enabled";
  
          private static final Validator NETWORK_RECOMMENDATIONS_ENABLED_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[] {"-1", "0", "1"});
  
          /**
           * Which package name to use for network recommendations. If null, network recommendations
           * will neither be requested nor accepted.
           *
           * Use {@link NetworkScoreManager#getActiveScorerPackage()} to read this value and
           * {@link NetworkScoreManager#setActiveScorer(String)} to write it.
           *
           * Type: string - package name
           * @hide
           */
          public static final String NETWORK_RECOMMENDATIONS_PACKAGE =
                  "network_recommendations_package";
  
          /**
           * The package name of the application that connect and secures high quality open wifi
           * networks automatically.
           *
           * Type: string package name or null if the feature is either not provided or disabled.
           * @hide
           */
          @TestApi
          public static final String USE_OPEN_WIFI_PACKAGE = "use_open_wifi_package";
  
          private static final Validator USE_OPEN_WIFI_PACKAGE_VALIDATOR = new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  return (value == null) || PACKAGE_NAME_VALIDATOR.validate(value);
              }
          };
  
          /**
           * The number of milliseconds the {@link com.android.server.NetworkScoreService}
           * will give a recommendation request to complete before returning a default response.
           *
           * Type: long
           * @hide
           * @deprecated to be removed
           */
          public static final String NETWORK_RECOMMENDATION_REQUEST_TIMEOUT_MS =
                  "network_recommendation_request_timeout_ms";
  
          /**
           * The expiration time in milliseconds for the {@link android.net.WifiKey} request cache in
           * {@link com.android.server.wifi.RecommendedNetworkEvaluator}.
           *
           * Type: long
           * @hide
           */
          public static final String RECOMMENDED_NETWORK_EVALUATOR_CACHE_EXPIRY_MS =
                  "recommended_network_evaluator_cache_expiry_ms";
  
          /**
           * Whether wifi scan throttle is enabled or not.
           * This is intended to be used via adb commands or a menu in developer option to turn off
           * the default wifi scan throttling mechanism for apps.
           *
           * Type: int (0 for false, 1 for true)
           * @hide
           */
          public static final String WIFI_SCAN_THROTTLE_ENABLED = "wifi_scan_throttle_enabled";
  
          private static final Validator WIFI_SCAN_THROTTLE_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
          * Settings to allow BLE scans to be enabled even when Bluetooth is turned off for
          * connectivity.
          * @hide
          */
          public static final String BLE_SCAN_ALWAYS_AVAILABLE = "ble_scan_always_enabled";
  
          /**
           * The length in milliseconds of a BLE scan window in a low-power scan mode.
           * @hide
           */
          public static final String BLE_SCAN_LOW_POWER_WINDOW_MS = "ble_scan_low_power_window_ms";
  
          /**
           * The length in milliseconds of a BLE scan window in a balanced scan mode.
           * @hide
           */
          public static final String BLE_SCAN_BALANCED_WINDOW_MS = "ble_scan_balanced_window_ms";
  
          /**
           * The length in milliseconds of a BLE scan window in a low-latency scan mode.
           * @hide
           */
          public static final String BLE_SCAN_LOW_LATENCY_WINDOW_MS =
                  "ble_scan_low_latency_window_ms";
  
          /**
           * The length in milliseconds of a BLE scan interval in a low-power scan mode.
           * @hide
           */
          public static final String BLE_SCAN_LOW_POWER_INTERVAL_MS =
                  "ble_scan_low_power_interval_ms";
  
          /**
           * The length in milliseconds of a BLE scan interval in a balanced scan mode.
           * @hide
           */
          public static final String BLE_SCAN_BALANCED_INTERVAL_MS =
                  "ble_scan_balanced_interval_ms";
  
          /**
           * The length in milliseconds of a BLE scan interval in a low-latency scan mode.
           * @hide
           */
          public static final String BLE_SCAN_LOW_LATENCY_INTERVAL_MS =
                  "ble_scan_low_latency_interval_ms";
  
          /**
           * The mode that BLE scanning clients will be moved to when in the background.
           * @hide
           */
          public static final String BLE_SCAN_BACKGROUND_MODE = "ble_scan_background_mode";
  
         /**
          * Used to save the Wifi_ON state prior to tethering.
          * This state will be checked to restore Wifi after
          * the user turns off tethering.
          *
          * @hide
          */
         @UnsupportedAppUsage
         public static final String WIFI_SAVED_STATE = "wifi_saved_state";
  
         /**
          * The interval in milliseconds to scan as used by the wifi supplicant
          * @hide
          */
         public static final String WIFI_SUPPLICANT_SCAN_INTERVAL_MS =
                 "wifi_supplicant_scan_interval_ms";
  
          /**
           * whether frameworks handles wifi auto-join
           * @hide
           */
         public static final String WIFI_ENHANCED_AUTO_JOIN =
                  "wifi_enhanced_auto_join";
  
          /**
           * whether settings show RSSI
           * @hide
           */
          public static final String WIFI_NETWORK_SHOW_RSSI =
                  "wifi_network_show_rssi";
  
          /**
          * The interval in milliseconds to scan at supplicant when p2p is connected
          * @hide
          */
         public static final String WIFI_SCAN_INTERVAL_WHEN_P2P_CONNECTED_MS =
                 "wifi_scan_interval_p2p_connected_ms";
  
         /**
          * Whether the Wi-Fi watchdog is enabled.
          */
         public static final String WIFI_WATCHDOG_ON = "wifi_watchdog_on";
  
         /**
          * Setting to turn off poor network avoidance on Wi-Fi. Feature is enabled by default and
          * the setting needs to be set to 0 to disable it.
          * @hide
          */
         @UnsupportedAppUsage
         public static final String WIFI_WATCHDOG_POOR_NETWORK_TEST_ENABLED =
                 "wifi_watchdog_poor_network_test_enabled";
  
         private static final Validator WIFI_WATCHDOG_POOR_NETWORK_TEST_ENABLED_VALIDATOR =
                 ANY_STRING_VALIDATOR;
  
         /**
          * Setting to turn on suspend optimizations at screen off on Wi-Fi. Enabled by default and
          * needs to be set to 0 to disable it.
          * @hide
          */
         public static final String WIFI_SUSPEND_OPTIMIZATIONS_ENABLED =
                 "wifi_suspend_optimizations_enabled";
  
         /**
          * Setting to enable verbose logging in Wi-Fi; disabled by default, and setting to 1
          * will enable it. In the future, additional values may be supported.
          * @hide
          */
         public static final String WIFI_VERBOSE_LOGGING_ENABLED =
                 "wifi_verbose_logging_enabled";
  
          /**
           * Setting to enable connected MAC randomization in Wi-Fi; disabled by default, and
           * setting to 1 will enable it. In the future, additional values may be supported.
           * @deprecated MAC randomization is now a per-network setting
           * @hide
           */
          @Deprecated
          public static final String WIFI_CONNECTED_MAC_RANDOMIZATION_ENABLED =
                  "wifi_connected_mac_randomization_enabled";
  
          /**
           * Parameters to adjust the performance of framework wifi scoring methods.
           * <p>
           * Encoded as a comma-separated key=value list, for example:
           *   "rssi5=-80:-77:-70:-57,rssi2=-83:-80:-73:-60,horizon=15"
           * This is intended for experimenting with new parameter values,
           * and is normally unset or empty. The example does not include all
           * parameters that may be honored.
           * Default values are provided by code or device configurations.
           * Errors in the parameters will cause the entire setting to be ignored.
           * @hide
           */
          public static final String WIFI_SCORE_PARAMS =
                  "wifi_score_params";
  
          /**
           * Setting to enable logging WifiIsUnusableEvent in metrics
           * which gets triggered when wifi becomes unusable.
           * Disabled by default, and setting it to 1 will enable it.
           * @hide
           */
          public static final String WIFI_IS_UNUSABLE_EVENT_METRICS_ENABLED =
                  "wifi_is_unusable_event_metrics_enabled";
  
          /**
           * The minimum number of txBad the framework has to observe
           * to trigger a wifi data stall.
           * @hide
           */
          public static final String WIFI_DATA_STALL_MIN_TX_BAD =
                  "wifi_data_stall_min_tx_bad";
  
          /**
           * The minimum number of txSuccess the framework has to observe
           * to trigger a wifi data stall when rxSuccess is 0.
           * @hide
           */
          public static final String WIFI_DATA_STALL_MIN_TX_SUCCESS_WITHOUT_RX =
                  "wifi_data_stall_min_tx_success_without_rx";
  
          /**
           * Setting to enable logging Wifi LinkSpeedCounts in metrics.
           * Disabled by default, and setting it to 1 will enable it.
           * @hide
           */
          public static final String WIFI_LINK_SPEED_METRICS_ENABLED =
                  "wifi_link_speed_metrics_enabled";
  
          /**
           * Setting to enable the PNO frequency culling optimization.
           * Disabled by default, and setting it to 1 will enable it.
           * The value is boolean (0 or 1).
           * @hide
           */
          public static final String WIFI_PNO_FREQUENCY_CULLING_ENABLED =
                  "wifi_pno_frequency_culling_enabled";
  
          private static final Validator WIFI_PNO_FREQUENCY_CULLING_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Setting to enable including recency information when determining pno network priorities.
           * Disabled by default, and setting it to 1 will enable it.
           * The value is boolean (0 or 1).
           * @hide
           */
          public static final String WIFI_PNO_RECENCY_SORTING_ENABLED =
                  "wifi_pno_recency_sorting_enabled";
  
          private static final Validator WIFI_PNO_RECENCY_SORTING_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Setting to enable the Wi-Fi link probing.
           * Enabled by default, and setting it to 0 will disable it.
           * The value is boolean (0 or 1).
           * @hide
           */
          public static final String WIFI_LINK_PROBING_ENABLED =
                  "wifi_link_probing_enabled";
  
          private static final Validator WIFI_LINK_PROBING_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
         /**
          * The maximum number of times we will retry a connection to an access
          * point for which we have failed in acquiring an IP address from DHCP.
          * A value of N means that we will make N+1 connection attempts in all.
          */
         public static final String WIFI_MAX_DHCP_RETRY_COUNT = "wifi_max_dhcp_retry_count";
  
         /**
          * Maximum amount of time in milliseconds to hold a wakelock while waiting for mobile
          * data connectivity to be established after a disconnect from Wi-Fi.
          */
         public static final String WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS =
             "wifi_mobile_data_transition_wakelock_timeout_ms";
  
         /**
          * This setting controls whether WiFi configurations created by a Device Owner app
          * should be locked down (that is, be editable or removable only by the Device Owner App,
          * not even by Settings app).
          * This setting takes integer values. Non-zero values mean DO created configurations
          * are locked down. Value of zero means they are not. Default value in the absence of
          * actual value to this setting is 0.
          */
         public static final String WIFI_DEVICE_OWNER_CONFIGS_LOCKDOWN =
                 "wifi_device_owner_configs_lockdown";
  
         /**
          * The operational wifi frequency band
          * Set to one of {@link WifiManager#WIFI_FREQUENCY_BAND_AUTO},
          * {@link WifiManager#WIFI_FREQUENCY_BAND_5GHZ} or
          * {@link WifiManager#WIFI_FREQUENCY_BAND_2GHZ}
          *
          * @hide
          */
         public static final String WIFI_FREQUENCY_BAND = "wifi_frequency_band";
  
         /**
          * The Wi-Fi peer-to-peer device name
          * @hide
          */
         public static final String WIFI_P2P_DEVICE_NAME = "wifi_p2p_device_name";
  
         /**
          * The min time between wifi disable and wifi enable
          * @hide
          */
         public static final String WIFI_REENABLE_DELAY_MS = "wifi_reenable_delay";
  
         /**
          * Timeout for ephemeral networks when all known BSSIDs go out of range. We will disconnect
          * from an ephemeral network if there is no BSSID for that network with a non-null score that
          * has been seen in this time period.
          *
          * If this is less than or equal to zero, we use a more conservative behavior and only check
          * for a non-null score from the currently connected or target BSSID.
          * @hide
          */
         public static final String WIFI_EPHEMERAL_OUT_OF_RANGE_TIMEOUT_MS =
                 "wifi_ephemeral_out_of_range_timeout_ms";
  
         /**
          * The number of milliseconds to delay when checking for data stalls during
          * non-aggressive detection. (screen is turned off.)
          * @hide
          */
         public static final String DATA_STALL_ALARM_NON_AGGRESSIVE_DELAY_IN_MS =
                 "data_stall_alarm_non_aggressive_delay_in_ms";
  
         /**
          * The number of milliseconds to delay when checking for data stalls during
          * aggressive detection. (screen on or suspected data stall)
          * @hide
          */
         public static final String DATA_STALL_ALARM_AGGRESSIVE_DELAY_IN_MS =
                 "data_stall_alarm_aggressive_delay_in_ms";
  
         /**
          * The number of milliseconds to allow the provisioning apn to remain active
          * @hide
          */
         public static final String PROVISIONING_APN_ALARM_DELAY_IN_MS =
                 "provisioning_apn_alarm_delay_in_ms";
  
         /**
          * The interval in milliseconds at which to check gprs registration
          * after the first registration mismatch of gprs and voice service,
          * to detect possible data network registration problems.
          *
          * @hide
          */
         public static final String GPRS_REGISTER_CHECK_PERIOD_MS =
                 "gprs_register_check_period_ms";
  
         /**
          * Nonzero causes Log.wtf() to crash.
          * @hide
          */
         public static final String WTF_IS_FATAL = "wtf_is_fatal";
  
         /**
          * Ringer mode. This is used internally, changing this value will not
          * change the ringer mode. See AudioManager.
          */
         public static final String MODE_RINGER = "mode_ringer";
  
         /**
          * Overlay display devices setting.
          * The associated value is a specially formatted string that describes the
          * size and density of simulated secondary display devices.
          * <p>
          * Format: {width}x{height}/{dpi};...
          * </p><p>
          * Example:
          * <ul>
          * <li><code>1280x720/213</code>: make one overlay that is 1280x720 at 213dpi.</li>
          * <li><code>1920x1080/320;1280x720/213</code>: make two overlays, the first
          * at 1080p and the second at 720p.</li>
          * <li>If the value is empty, then no overlay display devices are created.</li>
          * </ul></p>
          *
          * @hide
          */
         @TestApi
         public static final String OVERLAY_DISPLAY_DEVICES = "overlay_display_devices";
  
          /**
           * Threshold values for the duration and level of a discharge cycle,
           * under which we log discharge cycle info.
           *
           * @hide
           */
          public static final String
                  BATTERY_DISCHARGE_DURATION_THRESHOLD = "battery_discharge_duration_threshold";
  
          /** @hide */
          public static final String BATTERY_DISCHARGE_THRESHOLD = "battery_discharge_threshold";
  
          /**
           * Flag for allowing ActivityManagerService to send ACTION_APP_ERROR
           * intents on application crashes and ANRs. If this is disabled, the
           * crash/ANR dialog will never display the "Report" button.
           * <p>
           * Type: int (0 = disallow, 1 = allow)
           *
           * @hide
           */
          public static final String SEND_ACTION_APP_ERROR = "send_action_app_error";
  
          /**
           * Maximum age of entries kept by {@link DropBoxManager}.
           *
           * @hide
           */
          public static final String DROPBOX_AGE_SECONDS = "dropbox_age_seconds";
  
          /**
           * Maximum number of entry files which {@link DropBoxManager} will keep
           * around.
           *
           * @hide
           */
          public static final String DROPBOX_MAX_FILES = "dropbox_max_files";
  
          /**
           * Maximum amount of disk space used by {@link DropBoxManager} no matter
           * what.
           *
           * @hide
           */
          public static final String DROPBOX_QUOTA_KB = "dropbox_quota_kb";
  
          /**
           * Percent of free disk (excluding reserve) which {@link DropBoxManager}
           * will use.
           *
           * @hide
           */
          public static final String DROPBOX_QUOTA_PERCENT = "dropbox_quota_percent";
  
          /**
           * Percent of total disk which {@link DropBoxManager} will never dip
           * into.
           *
           * @hide
           */
          public static final String DROPBOX_RESERVE_PERCENT = "dropbox_reserve_percent";
  
          /**
           * Prefix for per-tag dropbox disable/enable settings.
           *
           * @hide
           */
          public static final String DROPBOX_TAG_PREFIX = "dropbox:";
  
          /**
           * Lines of logcat to include with system crash/ANR/etc. reports, as a
           * prefix of the dropbox tag of the report type. For example,
           * "logcat_for_system_server_anr" controls the lines of logcat captured
           * with system server ANR reports. 0 to disable.
           *
           * @hide
           */
          public static final String ERROR_LOGCAT_PREFIX = "logcat_for_";
  
          /**
           * The interval in minutes after which the amount of free storage left
           * on the device is logged to the event log
           *
           * @hide
           */
          public static final String SYS_FREE_STORAGE_LOG_INTERVAL = "sys_free_storage_log_interval";
  
          /**
           * Threshold for the amount of change in disk free space required to
           * report the amount of free space. Used to prevent spamming the logs
           * when the disk free space isn't changing frequently.
           *
           * @hide
           */
          public static final String
                  DISK_FREE_CHANGE_REPORTING_THRESHOLD = "disk_free_change_reporting_threshold";
  
          /**
           * Minimum percentage of free storage on the device that is used to
           * determine if the device is running low on storage. The default is 10.
           * <p>
           * Say this value is set to 10, the device is considered running low on
           * storage if 90% or more of the device storage is filled up.
           *
           * @hide
           */
          public static final String
                  SYS_STORAGE_THRESHOLD_PERCENTAGE = "sys_storage_threshold_percentage";
  
          /**
           * Maximum byte size of the low storage threshold. This is to ensure
           * that {@link #SYS_STORAGE_THRESHOLD_PERCENTAGE} does not result in an
           * overly large threshold for large storage devices. Currently this must
           * be less than 2GB. This default is 500MB.
           *
           * @hide
           */
          public static final String
                  SYS_STORAGE_THRESHOLD_MAX_BYTES = "sys_storage_threshold_max_bytes";
  
          /**
           * Minimum bytes of free storage on the device before the data partition
           * is considered full. By default, 1 MB is reserved to avoid system-wide
           * SQLite disk full exceptions.
           *
           * @hide
           */
          public static final String
                  SYS_STORAGE_FULL_THRESHOLD_BYTES = "sys_storage_full_threshold_bytes";
  
          /**
           * Minimum percentage of storage on the device that is reserved for
           * cached data.
           *
           * @hide
           */
          public static final String
                  SYS_STORAGE_CACHE_PERCENTAGE = "sys_storage_cache_percentage";
  
          /**
           * Maximum bytes of storage on the device that is reserved for cached
           * data.
           *
           * @hide
           */
          public static final String
                  SYS_STORAGE_CACHE_MAX_BYTES = "sys_storage_cache_max_bytes";
  
          /**
           * The maximum reconnect delay for short network outages or when the
           * network is suspended due to phone use.
           *
           * @hide
           */
          public static final String
                  SYNC_MAX_RETRY_DELAY_IN_SECONDS = "sync_max_retry_delay_in_seconds";
  
          /**
           * The number of milliseconds to delay before sending out
           * {@link ConnectivityManager#CONNECTIVITY_ACTION} broadcasts. Ignored.
           *
           * @hide
           */
          public static final String CONNECTIVITY_CHANGE_DELAY = "connectivity_change_delay";
  
  
          /**
           * Network sampling interval, in seconds. We'll generate link information
           * about bytes/packets sent and error rates based on data sampled in this interval
           *
           * @hide
           */
  
          public static final String CONNECTIVITY_SAMPLING_INTERVAL_IN_SECONDS =
                  "connectivity_sampling_interval_in_seconds";
  
          /**
           * The series of successively longer delays used in retrying to download PAC file.
           * Last delay is used between successful PAC downloads.
           *
           * @hide
           */
          public static final String PAC_CHANGE_DELAY = "pac_change_delay";
  
          /**
           * Don't attempt to detect captive portals.
           *
           * @hide
           */
          public static final int CAPTIVE_PORTAL_MODE_IGNORE = 0;
  
          /**
           * When detecting a captive portal, display a notification that
           * prompts the user to sign in.
           *
           * @hide
           */
          public static final int CAPTIVE_PORTAL_MODE_PROMPT = 1;
  
          /**
           * When detecting a captive portal, immediately disconnect from the
           * network and do not reconnect to that network in the future.
           *
           * @hide
           */
          public static final int CAPTIVE_PORTAL_MODE_AVOID = 2;
  
          /**
           * What to do when connecting a network that presents a captive portal.
           * Must be one of the CAPTIVE_PORTAL_MODE_* constants above.
           *
           * The default for this setting is CAPTIVE_PORTAL_MODE_PROMPT.
           * @hide
           */
          public static final String CAPTIVE_PORTAL_MODE = "captive_portal_mode";
  
          /**
           * Setting to turn off captive portal detection. Feature is enabled by
           * default and the setting needs to be set to 0 to disable it.
           *
           * @deprecated use CAPTIVE_PORTAL_MODE_IGNORE to disable captive portal detection
           * @hide
           */
          @Deprecated
          public static final String
                  CAPTIVE_PORTAL_DETECTION_ENABLED = "captive_portal_detection_enabled";
  
          /**
           * The server used for captive portal detection upon a new conection. A
           * 204 response code from the server is used for validation.
           * TODO: remove this deprecated symbol.
           *
           * @hide
           */
          public static final String CAPTIVE_PORTAL_SERVER = "captive_portal_server";
  
          /**
           * The URL used for HTTPS captive portal detection upon a new connection.
           * A 204 response code from the server is used for validation.
           *
           * @hide
           */
          public static final String CAPTIVE_PORTAL_HTTPS_URL = "captive_portal_https_url";
  
          /**
           * The URL used for HTTP captive portal detection upon a new connection.
           * A 204 response code from the server is used for validation.
           *
           * @hide
           */
          public static final String CAPTIVE_PORTAL_HTTP_URL = "captive_portal_http_url";
  
          /**
           * The URL used for fallback HTTP captive portal detection when previous HTTP
           * and HTTPS captive portal detection attemps did not return a conclusive answer.
           *
           * @hide
           */
          public static final String CAPTIVE_PORTAL_FALLBACK_URL = "captive_portal_fallback_url";
  
          /**
           * A comma separated list of URLs used for captive portal detection in addition to the
           * fallback HTTP url associated with the CAPTIVE_PORTAL_FALLBACK_URL settings.
           *
           * @hide
           */
          public static final String CAPTIVE_PORTAL_OTHER_FALLBACK_URLS =
                  "captive_portal_other_fallback_urls";
  
          /**
           * A list of captive portal detection specifications used in addition to the fallback URLs.
           * Each spec has the format url@@/@@statusCodeRegex@@/@@contentRegex. Specs are separated
           * by "@@,@@".
           * @hide
           */
          public static final String CAPTIVE_PORTAL_FALLBACK_PROBE_SPECS =
                  "captive_portal_fallback_probe_specs";
  
          /**
           * Whether to use HTTPS for network validation. This is enabled by default and the setting
           * needs to be set to 0 to disable it. This setting is a misnomer because captive portals
           * don't actually use HTTPS, but it's consistent with the other settings.
           *
           * @hide
           */
          public static final String CAPTIVE_PORTAL_USE_HTTPS = "captive_portal_use_https";
  
          /**
           * Which User-Agent string to use in the header of the captive portal detection probes.
           * The User-Agent field is unset when this setting has no value (HttpUrlConnection default).
           *
           * @hide
           */
          public static final String CAPTIVE_PORTAL_USER_AGENT = "captive_portal_user_agent";
  
          /**
           * Whether to try cellular data recovery when a bad network is reported.
           *
           * @hide
           */
          public static final String DATA_STALL_RECOVERY_ON_BAD_NETWORK =
                  "data_stall_recovery_on_bad_network";
  
          /**
           * Minumim duration in millisecodns between cellular data recovery attempts
           *
           * @hide
           */
          public static final String MIN_DURATION_BETWEEN_RECOVERY_STEPS_IN_MS =
                  "min_duration_between_recovery_steps";
          /**
           * Whether network service discovery is enabled.
           *
           * @hide
           */
          public static final String NSD_ON = "nsd_on";
  
          /**
           * Let user pick default install location.
           *
           * @hide
           */
          public static final String SET_INSTALL_LOCATION = "set_install_location";
  
          /**
           * Default install location value.
           * 0 = auto, let system decide
           * 1 = internal
           * 2 = sdcard
           * @hide
           */
          public static final String DEFAULT_INSTALL_LOCATION = "default_install_location";
  
          /**
           * ms during which to consume extra events related to Inet connection
           * condition after a transtion to fully-connected
           *
           * @hide
           */
          public static final String
                  INET_CONDITION_DEBOUNCE_UP_DELAY = "inet_condition_debounce_up_delay";
  
          /**
           * ms during which to consume extra events related to Inet connection
           * condtion after a transtion to partly-connected
           *
           * @hide
           */
          public static final String
                  INET_CONDITION_DEBOUNCE_DOWN_DELAY = "inet_condition_debounce_down_delay";
  
          /** {@hide} */
          public static final String
                  READ_EXTERNAL_STORAGE_ENFORCED_DEFAULT = "read_external_storage_enforced_default";
  
          /**
           * Host name and port for global http proxy. Uses ':' seperator for
           * between host and port.
           */
          public static final String HTTP_PROXY = "http_proxy";
  
          /**
           * Host name for global http proxy. Set via ConnectivityManager.
           *
           * @hide
           */
          public static final String GLOBAL_HTTP_PROXY_HOST = "global_http_proxy_host";
  
          /**
           * Integer host port for global http proxy. Set via ConnectivityManager.
           *
           * @hide
           */
          public static final String GLOBAL_HTTP_PROXY_PORT = "global_http_proxy_port";
  
          /**
           * Exclusion list for global proxy. This string contains a list of
           * comma-separated domains where the global proxy does not apply.
           * Domains should be listed in a comma- separated list. Example of
           * acceptable formats: ".domain1.com,my.domain2.com" Use
           * ConnectivityManager to set/get.
           *
           * @hide
           */
          public static final String
                  GLOBAL_HTTP_PROXY_EXCLUSION_LIST = "global_http_proxy_exclusion_list";
  
          /**
           * The location PAC File for the proxy.
           * @hide
           */
          public static final String
                  GLOBAL_HTTP_PROXY_PAC = "global_proxy_pac_url";
  
          /**
           * Enables the UI setting to allow the user to specify the global HTTP
           * proxy and associated exclusion list.
           *
           * @hide
           */
          public static final String SET_GLOBAL_HTTP_PROXY = "set_global_http_proxy";
  
          /**
           * Setting for default DNS in case nobody suggests one
           *
           * @hide
           */
          public static final String DEFAULT_DNS_SERVER = "default_dns_server";
  
          /**
           * The requested Private DNS mode (string), and an accompanying specifier (string).
           *
           * Currently, the specifier holds the chosen provider name when the mode requests
           * a specific provider. It may be used to store the provider name even when the
           * mode changes so that temporarily disabling and re-enabling the specific
           * provider mode does not necessitate retyping the provider hostname.
           *
           * @hide
           */
          public static final String PRIVATE_DNS_MODE = "private_dns_mode";
  
          private static final Validator PRIVATE_DNS_MODE_VALIDATOR = ANY_STRING_VALIDATOR;
  
          /**
           * @hide
           */
          public static final String PRIVATE_DNS_SPECIFIER = "private_dns_specifier";
  
          private static final Validator PRIVATE_DNS_SPECIFIER_VALIDATOR = ANY_STRING_VALIDATOR;
  
          /**
            * Forced override of the default mode (hardcoded as "automatic", nee "opportunistic").
            * This allows changing the default mode without effectively disabling other modes,
            * all of which require explicit user action to enable/configure. See also b/79719289.
            *
            * Value is a string, suitable for assignment to PRIVATE_DNS_MODE above.
            *
            * {@hide}
            */
          public static final String PRIVATE_DNS_DEFAULT_MODE = "private_dns_default_mode";
  
  
          /** {@hide} */
          public static final String
                  BLUETOOTH_BTSNOOP_DEFAULT_MODE = "bluetooth_btsnoop_default_mode";
          /** {@hide} */
          public static final String
                  BLUETOOTH_HEADSET_PRIORITY_PREFIX = "bluetooth_headset_priority_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_A2DP_SINK_PRIORITY_PREFIX = "bluetooth_a2dp_sink_priority_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_A2DP_SRC_PRIORITY_PREFIX = "bluetooth_a2dp_src_priority_";
          /** {@hide} */
          public static final String BLUETOOTH_A2DP_SUPPORTS_OPTIONAL_CODECS_PREFIX =
                  "bluetooth_a2dp_supports_optional_codecs_";
          /** {@hide} */
          public static final String BLUETOOTH_A2DP_OPTIONAL_CODECS_ENABLED_PREFIX =
                  "bluetooth_a2dp_optional_codecs_enabled_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_INPUT_DEVICE_PRIORITY_PREFIX = "bluetooth_input_device_priority_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_MAP_PRIORITY_PREFIX = "bluetooth_map_priority_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_MAP_CLIENT_PRIORITY_PREFIX = "bluetooth_map_client_priority_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_PBAP_CLIENT_PRIORITY_PREFIX = "bluetooth_pbap_client_priority_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_SAP_PRIORITY_PREFIX = "bluetooth_sap_priority_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_PAN_PRIORITY_PREFIX = "bluetooth_pan_priority_";
          /** {@hide} */
          public static final String
                  BLUETOOTH_HEARING_AID_PRIORITY_PREFIX = "bluetooth_hearing_aid_priority_";
          /**
           * Enable/disable radio bug detection
           *
           * {@hide}
           */
          public static final String
                  ENABLE_RADIO_BUG_DETECTION = "enable_radio_bug_detection";
  
          /**
           * Count threshold of RIL wakelock timeout for radio bug detection
           *
           * {@hide}
           */
          public static final String
                  RADIO_BUG_WAKELOCK_TIMEOUT_COUNT_THRESHOLD =
                  "radio_bug_wakelock_timeout_count_threshold";
  
          /**
           * Count threshold of RIL system error for radio bug detection
           *
           * {@hide}
           */
          public static final String
                  RADIO_BUG_SYSTEM_ERROR_COUNT_THRESHOLD =
                  "radio_bug_system_error_count_threshold";
  
          /**
           * Activity manager specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "gc_timeout=5000,max_cached_processes=24"
           *
           * The following keys are supported:
           *
           * <pre>
           * max_cached_processes                 (int)
           * background_settle_time               (long)
           * fgservice_min_shown_time             (long)
           * fgservice_min_report_time            (long)
           * fgservice_screen_on_before_time      (long)
           * fgservice_screen_on_after_time       (long)
           * content_provider_retain_time         (long)
           * gc_timeout                           (long)
           * gc_min_interval                      (long)
           * full_pss_min_interval                (long)
           * full_pss_lowered_interval            (long)
           * power_check_interval                 (long)
           * power_check_max_cpu_1                (int)
           * power_check_max_cpu_2                (int)
           * power_check_max_cpu_3                (int)
           * power_check_max_cpu_4                (int)
           * service_usage_interaction_time       (long)
           * usage_stats_interaction_interval     (long)
           * service_restart_duration             (long)
           * service_reset_run_duration           (long)
           * service_restart_duration_factor      (int)
           * service_min_restart_time_between     (long)
           * service_max_inactivity               (long)
           * service_bg_start_timeout             (long)
           * service_bg_activity_start_timeout    (long)
           * process_start_async                  (boolean)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.am.ActivityManagerConstants
           */
          public static final String ACTIVITY_MANAGER_CONSTANTS = "activity_manager_constants";
  
          /**
           * Feature flag to enable or disable the activity starts logging feature.
           * Type: int (0 for false, 1 for true)
           * Default: 1
           * @hide
           */
          public static final String ACTIVITY_STARTS_LOGGING_ENABLED
                  = "activity_starts_logging_enabled";
  
          /**
           * @hide
           * @see com.android.server.appbinding.AppBindingConstants
           */
          public static final String APP_BINDING_CONSTANTS = "app_binding_constants";
  
          /**
           * App ops specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "state_settle_time=10000"
           *
           * The following keys are supported:
           *
           * <pre>
           * top_state_settle_time                (long)
           * fg_service_state_settle_time         (long)
           * bg_state_settle_time                 (long)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.AppOpsService.Constants
           */
          public static final String APP_OPS_CONSTANTS = "app_ops_constants";
  
          /**
           * Device Idle (Doze) specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "inactive_to=60000,sensing_to=400000"
           *
           * The following keys are supported:
           *
           * <pre>
           * inactive_to                      (long)
           * sensing_to                       (long)
           * motion_inactive_to               (long)
           * idle_after_inactive_to           (long)
           * idle_pending_to                  (long)
           * max_idle_pending_to              (long)
           * idle_pending_factor              (float)
           * quick_doze_delay_to              (long)
           * idle_to                          (long)
           * max_idle_to                      (long)
           * idle_factor                      (float)
           * min_time_to_alarm                (long)
           * max_temp_app_whitelist_duration  (long)
           * notification_whitelist_duration  (long)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.DeviceIdleController.Constants
           */
          public static final String DEVICE_IDLE_CONSTANTS = "device_idle_constants";
  
          /**
           * Battery Saver specific settings
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "vibration_disabled=true,adjust_brightness_factor=0.5"
           *
           * The following keys are supported:
           *
           * <pre>
           * advertise_is_enabled              (boolean)
           * datasaver_disabled                (boolean)
           * enable_night_mode                 (boolean)
           * launch_boost_disabled             (boolean)
           * vibration_disabled                (boolean)
           * animation_disabled                (boolean)
           * soundtrigger_disabled             (boolean)
           * fullbackup_deferred               (boolean)
           * keyvaluebackup_deferred           (boolean)
           * firewall_disabled                 (boolean)
           * gps_mode                          (int)
           * adjust_brightness_disabled        (boolean)
           * adjust_brightness_factor          (float)
           * force_all_apps_standby            (boolean)
           * force_background_check            (boolean)
           * optional_sensors_disabled         (boolean)
           * aod_disabled                      (boolean)
           * quick_doze_enabled                (boolean)
           * </pre>
           * @hide
           * @see com.android.server.power.batterysaver.BatterySaverPolicy
           */
          @TestApi
          public static final String BATTERY_SAVER_CONSTANTS = "battery_saver_constants";
  
          /**
           * Battery Saver device specific settings
           * This is encoded as a key=value list, separated by commas.
           *
           * The following keys are supported:
           *
           * <pre>
           *     cpufreq-i (list of "core-number:frequency" pairs concatenated with /)
           *     cpufreq-n (list of "core-number:frequency" pairs concatenated with /)
           * </pre>
           *
           * See {@link com.android.server.power.batterysaver.BatterySaverPolicy} for the details.
           *
           * @hide
           */
          public static final String BATTERY_SAVER_DEVICE_SPECIFIC_CONSTANTS =
                  "battery_saver_device_specific_constants";
  
          /**
           * Settings for adaptive Battery Saver mode. Uses the same flags as
           * {@link #BATTERY_SAVER_CONSTANTS}.
           *
           * @hide
           */
          public static final String BATTERY_SAVER_ADAPTIVE_CONSTANTS =
                  "battery_saver_adaptive_constants";
  
          /**
           * Device specific settings for adaptive Battery Saver mode. Uses the same flags as
           * {@link #BATTERY_SAVER_DEVICE_SPECIFIC_CONSTANTS}.
           *
           * @hide
           */
          public static final String BATTERY_SAVER_ADAPTIVE_DEVICE_SPECIFIC_CONSTANTS =
                  "battery_saver_adaptive_device_specific_constants";
  
          /**
           * Battery tip specific settings
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "battery_tip_enabled=true,summary_enabled=true,high_usage_enabled=true,"
           * "high_usage_app_count=3,reduced_battery_enabled=false,reduced_battery_percent=50,"
           * "high_usage_battery_draining=25,high_usage_period_ms=3000"
           *
           * The following keys are supported:
           *
           * <pre>
           * battery_tip_enabled              (boolean)
           * summary_enabled                  (boolean)
           * battery_saver_tip_enabled        (boolean)
           * high_usage_enabled               (boolean)
           * high_usage_app_count             (int)
           * high_usage_period_ms             (long)
           * high_usage_battery_draining      (int)
           * app_restriction_enabled          (boolean)
           * reduced_battery_enabled          (boolean)
           * reduced_battery_percent          (int)
           * low_battery_enabled              (boolean)
           * low_battery_hour                 (int)
           * </pre>
           * @hide
           */
          public static final String BATTERY_TIP_CONSTANTS = "battery_tip_constants";
  
          /**
           * Battery anomaly detection specific settings
           * This is encoded as a key=value list, separated by commas.
           * wakeup_blacklisted_tags is a string, encoded as a set of tags, encoded via
           * {@link Uri#encode(String)}, separated by colons. Ex:
           *
           * "anomaly_detection_enabled=true,wakelock_threshold=2000,wakeup_alarm_enabled=true,"
           * "wakeup_alarm_threshold=10,wakeup_blacklisted_tags=tag1:tag2:with%2Ccomma:with%3Acolon"
           *
           * The following keys are supported:
           *
           * <pre>
           * anomaly_detection_enabled       (boolean)
           * wakelock_enabled                (boolean)
           * wakelock_threshold              (long)
           * wakeup_alarm_enabled            (boolean)
           * wakeup_alarm_threshold          (long)
           * wakeup_blacklisted_tags         (string)
           * bluetooth_scan_enabled          (boolean)
           * bluetooth_scan_threshold        (long)
           * </pre>
           * @hide
           */
          public static final String ANOMALY_DETECTION_CONSTANTS = "anomaly_detection_constants";
  
          /**
           * An integer to show the version of the anomaly config. Ex: 1, which means
           * current version is 1.
           * @hide
           */
          public static final String ANOMALY_CONFIG_VERSION = "anomaly_config_version";
  
          /**
           * A base64-encoded string represents anomaly stats config, used for
           * {@link android.app.StatsManager}.
           * @hide
           */
          public static final String ANOMALY_CONFIG = "anomaly_config";
  
          /**
           * Always on display(AOD) specific settings
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "prox_screen_off_delay=10000,screen_brightness_array=0:1:2:3:4"
           *
           * The following keys are supported:
           *
           * <pre>
           * screen_brightness_array         (int[])
           * dimming_scrim_array             (int[])
           * prox_screen_off_delay           (long)
           * prox_cooldown_trigger           (long)
           * prox_cooldown_period            (long)
           * </pre>
           * @hide
           */
          public static final String ALWAYS_ON_DISPLAY_CONSTANTS = "always_on_display_constants";
  
          /**
          * System VDSO global setting. This links to the "sys.vdso" system property.
          * The following values are supported:
          * false  -> both 32 and 64 bit vdso disabled
          * 32     -> 32 bit vdso enabled
          * 64     -> 64 bit vdso enabled
          * Any other value defaults to both 32 bit and 64 bit true.
          * @hide
          */
          public static final String SYS_VDSO = "sys_vdso";
  
          /**
          * UidCpuPower global setting. This links the sys.uidcpupower system property.
          * The following values are supported:
          * 0 -> /proc/uid_cpupower/* are disabled
          * 1 -> /proc/uid_cpupower/* are enabled
          * Any other value defaults to enabled.
          * @hide
          */
          public static final String SYS_UIDCPUPOWER = "sys_uidcpupower";
  
          /**
          * traced global setting. This controls weather the deamons: traced and
          * traced_probes run. This links the sys.traced system property.
          * The following values are supported:
          * 0 -> traced and traced_probes are disabled
          * 1 -> traced and traced_probes are enabled
          * Any other value defaults to disabled.
          * @hide
          */
          public static final String SYS_TRACED = "sys_traced";
  
          /**
           * An integer to reduce the FPS by this factor. Only for experiments. Need to reboot the
           * device for this setting to take full effect.
           *
           * @hide
           */
          public static final String FPS_DEVISOR = "fps_divisor";
  
          /**
           * Flag to enable or disable display panel low power mode (lpm)
           * false -> Display panel power saving mode is disabled.
           * true  -> Display panel power saving mode is enabled.
           *
           * @hide
           */
          public static final String DISPLAY_PANEL_LPM = "display_panel_lpm";
  
          /**
           * App time limit usage source setting.
           * This controls which app in a task will be considered the source of usage when
           * calculating app usage time limits.
           *
           * 1 -> task root app
           * 2 -> current app
           * Any other value defaults to task root app.
           *
           * Need to reboot the device for this setting to take effect.
           * @hide
           */
          public static final String APP_TIME_LIMIT_USAGE_SOURCE = "app_time_limit_usage_source";
  
          /**
           * App standby (app idle) specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           * <p>
           * "idle_duration=5000,parole_interval=4500,screen_thresholds=0/0/60000/120000"
           * <p>
           * All durations are in millis.
           * Array values are separated by forward slashes
           * The following keys are supported:
           *
           * <pre>
           * parole_interval                  (long)
           * parole_window                    (long)
           * parole_duration                  (long)
           * screen_thresholds                (long[4])
           * elapsed_thresholds               (long[4])
           * strong_usage_duration            (long)
           * notification_seen_duration       (long)
           * system_update_usage_duration     (long)
           * prediction_timeout               (long)
           * sync_adapter_duration            (long)
           * exempted_sync_duration           (long)
           * system_interaction_duration      (long)
           * initial_foreground_service_start_duration (long)
           * stable_charging_threshold        (long)
           *
           * idle_duration        (long) // This is deprecated and used to circumvent b/26355386.
           * idle_duration2       (long) // deprecated
           * wallclock_threshold  (long) // deprecated
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.usage.UsageStatsService.SettingsObserver
           */
          public static final String APP_IDLE_CONSTANTS = "app_idle_constants";
  
          /**
           * Enable ART bytecode verification verifications for debuggable apps.
           * 0 = disable, 1 = enable.
           * @hide
           */
          public static final String ART_VERIFIER_VERIFY_DEBUGGABLE =
                  "art_verifier_verify_debuggable";
  
          /**
           * Power manager specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "no_cached_wake_locks=1"
           *
           * The following keys are supported:
           *
           * <pre>
           * no_cached_wake_locks                 (boolean)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.power.PowerManagerConstants
           */
          public static final String POWER_MANAGER_CONSTANTS = "power_manager_constants";
  
          /**
           * Alarm manager specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "min_futurity=5000,allow_while_idle_short_time=4500"
           *
           * The following keys are supported:
           *
           * <pre>
           * min_futurity                         (long)
           * min_interval                         (long)
           * allow_while_idle_short_time          (long)
           * allow_while_idle_long_time           (long)
           * allow_while_idle_whitelist_duration  (long)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.AlarmManagerService.Constants
           */
          public static final String ALARM_MANAGER_CONSTANTS = "alarm_manager_constants";
  
          /**
           * Job scheduler specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "min_ready_jobs_count=2,moderate_use_factor=.5"
           *
           * The following keys are supported:
           *
           * <pre>
           * min_idle_count                       (int)
           * min_charging_count                   (int)
           * min_connectivity_count               (int)
           * min_content_count                    (int)
           * min_ready_jobs_count                 (int)
           * heavy_use_factor                     (float)
           * moderate_use_factor                  (float)
           * fg_job_count                         (int)
           * bg_normal_job_count                  (int)
           * bg_moderate_job_count                (int)
           * bg_low_job_count                     (int)
           * bg_critical_job_count                (int)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.job.JobSchedulerService.Constants
           */
          public static final String JOB_SCHEDULER_CONSTANTS = "job_scheduler_constants";
  
          /**
           * Job scheduler QuotaController specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "max_job_count_working=5,max_job_count_rare=2"
           *
           * <p>
           * Type: string
           *
           * @hide
           * @see com.android.server.job.JobSchedulerService.Constants
           */
          public static final String JOB_SCHEDULER_QUOTA_CONTROLLER_CONSTANTS =
                  "job_scheduler_quota_controller_constants";
  
          /**
           * Job scheduler TimeController specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "skip_not_ready_jobs=true5,other_key=2"
           *
           * <p>
           * Type: string
           *
           * @hide
           * @see com.android.server.job.JobSchedulerService.Constants
           */
          public static final String JOB_SCHEDULER_TIME_CONTROLLER_CONSTANTS =
                  "job_scheduler_time_controller_constants";
  
          /**
           * ShortcutManager specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "reset_interval_sec=86400,max_updates_per_interval=1"
           *
           * The following keys are supported:
           *
           * <pre>
           * reset_interval_sec              (long)
           * max_updates_per_interval        (int)
           * max_icon_dimension_dp           (int, DP)
           * max_icon_dimension_dp_lowram    (int, DP)
           * max_shortcuts                   (int)
           * icon_quality                    (int, 0-100)
           * icon_format                     (String)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.pm.ShortcutService.ConfigConstants
           */
          public static final String SHORTCUT_MANAGER_CONSTANTS = "shortcut_manager_constants";
  
          /**
           * DevicePolicyManager specific settings.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * <pre>
           * das_died_service_reconnect_backoff_sec       (long)
           * das_died_service_reconnect_backoff_increase  (float)
           * das_died_service_reconnect_max_backoff_sec   (long)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * see also com.android.server.devicepolicy.DevicePolicyConstants
           */
          public static final String DEVICE_POLICY_CONSTANTS = "device_policy_constants";
  
          /**
           * TextClassifier specific settings.
           * This is encoded as a key=value list, separated by commas. String[] types like
           * entity_list_default use ":" as delimiter for values. Ex:
           *
           * <pre>
           * classify_text_max_range_length                   (int)
           * detect_language_from_text_enabled                (boolean)
           * entity_list_default                              (String[])
           * entity_list_editable                             (String[])
           * entity_list_not_editable                         (String[])
           * generate_links_log_sample_rate                   (int)
           * generate_links_max_text_length                   (int)
           * in_app_conversation_action_types_default         (String[])
           * lang_id_context_settings                         (float[])
           * lang_id_threshold_override                       (float)
           * local_textclassifier_enabled                     (boolean)
           * model_dark_launch_enabled                        (boolean)
           * notification_conversation_action_types_default   (String[])
           * smart_linkify_enabled                            (boolean)
           * smart_select_animation_enabled                   (boolean)
           * smart_selection_enabled                          (boolean)
           * smart_text_share_enabled                         (boolean)
           * suggest_selection_max_range_length               (int)
           * system_textclassifier_enabled                    (boolean)
           * template_intent_factory_enabled                  (boolean)
           * translate_in_classification_enabled              (boolean)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * see also android.view.textclassifier.TextClassificationConstants
           */
          public static final String TEXT_CLASSIFIER_CONSTANTS = "text_classifier_constants";
  
          /**
           * BatteryStats specific settings.
           * This is encoded as a key=value list, separated by commas. Ex: "foo=1,bar=true"
           *
           * The following keys are supported:
           * <pre>
           * track_cpu_times_by_proc_state (boolean)
           * track_cpu_active_cluster_time (boolean)
           * read_binary_cpu_time          (boolean)
           * proc_state_cpu_times_read_delay_ms (long)
           * external_stats_collection_rate_limit_ms (long)
           * battery_level_collection_delay_ms (long)
           * max_history_files (int)
           * max_history_buffer_kb (int)
           * battery_charged_delay_ms (int)
           * </pre>
           *
           * <p>
           * Type: string
           * @hide
           * see also com.android.internal.os.BatteryStatsImpl.Constants
           */
          public static final String BATTERY_STATS_CONSTANTS = "battery_stats_constants";
  
          /**
           * SyncManager specific settings.
           *
           * <p>
           * Type: string
           * @hide
           * @see com.android.server.content.SyncManagerConstants
           */
          public static final String SYNC_MANAGER_CONSTANTS = "sync_manager_constants";
  
          /**
           * Broadcast dispatch tuning parameters specific to foreground broadcasts.
           *
           * This is encoded as a key=value list, separated by commas. Ex: "foo=1,bar=true"
           *
           * The following keys are supported:
           * <pre>
           * bcast_timeout                (long)
           * bcast_slow_time              (long)
           * bcast_deferral               (long)
           * bcast_deferral_decay_factor  (float)
           * bcast_deferral_floor         (long)
           * bcast_allow_bg_activity_start_timeout    (long)
           * </pre>
           *
           * @hide
           */
          public static final String BROADCAST_FG_CONSTANTS = "bcast_fg_constants";
  
          /**
           * Broadcast dispatch tuning parameters specific to background broadcasts.
           *
           * This is encoded as a key=value list, separated by commas. Ex: "foo=1,bar=true".
           * See {@link #BROADCAST_FG_CONSTANTS} for the list of supported keys.
           *
           * @hide
           */
          public static final String BROADCAST_BG_CONSTANTS = "bcast_bg_constants";
  
          /**
           * Broadcast dispatch tuning parameters specific to specific "offline" broadcasts.
           *
           * This is encoded as a key=value list, separated by commas. Ex: "foo=1,bar=true".
           * See {@link #BROADCAST_FG_CONSTANTS} for the list of supported keys.
           *
           * @hide
           */
          public static final String BROADCAST_OFFLOAD_CONSTANTS = "bcast_offload_constants";
  
          /**
           * Whether or not App Standby feature is enabled by system. This controls throttling of apps
           * based on usage patterns and predictions. Platform will turn on this feature if both this
           * flag and {@link #ADAPTIVE_BATTERY_MANAGEMENT_ENABLED} is on.
           * Type: int (0 for false, 1 for true)
           * Default: 1
           * @hide
           * @see #ADAPTIVE_BATTERY_MANAGEMENT_ENABLED
           */
          @SystemApi
          public static final String APP_STANDBY_ENABLED = "app_standby_enabled";
  
          /**
           * Whether or not adaptive battery feature is enabled by user. Platform will turn on this
           * feature if both this flag and {@link #APP_STANDBY_ENABLED} is on.
           * Type: int (0 for false, 1 for true)
           * Default: 1
           * @hide
           * @see #APP_STANDBY_ENABLED
           */
          public static final String ADAPTIVE_BATTERY_MANAGEMENT_ENABLED =
                  "adaptive_battery_management_enabled";
  
          /**
           * Whether or not app auto restriction is enabled. When it is enabled, settings app will
           * auto restrict the app if it has bad behavior(e.g. hold wakelock for long time).
           *
           * Type: boolean (0 for false, 1 for true)
           * Default: 1
           *
           * @hide
           */
          public static final String APP_AUTO_RESTRICTION_ENABLED =
                  "app_auto_restriction_enabled";
  
          private static final Validator APP_AUTO_RESTRICTION_ENABLED_VALIDATOR =
                  BOOLEAN_VALIDATOR;
  
          /**
           * Feature flag to enable or disable the Forced App Standby feature.
           * Type: int (0 for false, 1 for true)
           * Default: 1
           * @hide
           */
          public static final String FORCED_APP_STANDBY_ENABLED = "forced_app_standby_enabled";
  
          /**
           * Whether or not to enable Forced App Standby on small battery devices.
           * Type: int (0 for false, 1 for true)
           * Default: 0
           * @hide
           */
          public static final String FORCED_APP_STANDBY_FOR_SMALL_BATTERY_ENABLED
                  = "forced_app_standby_for_small_battery_enabled";
  
          /**
           * Whether or not to enable the User Absent, Radios Off feature on small battery devices.
           * Type: int (0 for false, 1 for true)
           * Default: 0
           * @hide
           */
          public static final String USER_ABSENT_RADIOS_OFF_FOR_SMALL_BATTERY_ENABLED
                  = "user_absent_radios_off_for_small_battery_enabled";
  
          /**
           * Whether or not to enable the User Absent, Touch Off feature on small battery devices.
           * Type: int (0 for false, 1 for true)
           * Default: 0
           * @hide
           */
          public static final String USER_ABSENT_TOUCH_OFF_FOR_SMALL_BATTERY_ENABLED
                  = "user_absent_touch_off_for_small_battery_enabled";
  
          /**
           * Whether or not to turn on Wifi when proxy is disconnected.
           * Type: int (0 for false, 1 for true)
           * Default: 1
           * @hide
           */
          public static final String WIFI_ON_WHEN_PROXY_DISCONNECTED
                  = "wifi_on_when_proxy_disconnected";
  
          /**
           * Time Only Mode specific settings.
           * This is encoded as a key=value list, separated by commas. Ex: "foo=1,bar=true"
           *
           * The following keys are supported:
           *
           * <pre>
           * enabled                  (boolean)
           * disable_home             (boolean)
           * disable_tilt_to_wake     (boolean)
           * disable_touch_to_wake    (boolean)
           * </pre>
           * Type: string
           * @hide
           */
          public static final String TIME_ONLY_MODE_CONSTANTS
                  = "time_only_mode_constants";
  
          /**
           * Whether of not to send keycode sleep for ungaze when Home is the foreground activity on
           * watch type devices.
           * Type: int (0 for false, 1 for true)
           * Default: 0
           * @hide
           */
          public static final String UNGAZE_SLEEP_ENABLED = "ungaze_sleep_enabled";
  
          /**
           * Whether or not Network Watchlist feature is enabled.
           * Type: int (0 for false, 1 for true)
           * Default: 0
           * @hide
           */
          public static final String NETWORK_WATCHLIST_ENABLED = "network_watchlist_enabled";
  
          /**
           * Whether or not show hidden launcher icon apps feature is enabled.
           * Type: int (0 for false, 1 for true)
           * Default: 1
           * @hide
           */
          public static final String SHOW_HIDDEN_LAUNCHER_ICON_APPS_ENABLED =
                  "show_hidden_icon_apps_enabled";
  
          /**
           * Whether or not show new app installed notification is enabled.
           * Type: int (0 for false, 1 for true)
           * Default: 0
           * @hide
           */
          public static final String SHOW_NEW_APP_INSTALLED_NOTIFICATION_ENABLED =
                  "show_new_app_installed_notification_enabled";
  
          /**
           * Flag to keep background restricted profiles running after exiting. If disabled,
           * the restricted profile can be put into stopped state as soon as the user leaves it.
           * Type: int (0 for false, 1 for true)
           *
           * Overridden by the system based on device information. If null, the value specified
           * by {@code config_keepRestrictedProfilesInBackground} is used.
           *
           * @hide
           */
          public static final String KEEP_PROFILE_IN_BACKGROUND = "keep_profile_in_background";
  
          /**
           * The default time in ms within which a subsequent connection from an always allowed system
           * is allowed to reconnect without user interaction.
           *
           * @hide
           */
          public static final long DEFAULT_ADB_ALLOWED_CONNECTION_TIME = 604800000;
  
          /**
           * When the user first connects their device to a system a prompt is displayed to allow
           * the adb connection with an option to 'Always allow' connections from this system. If the
           * user selects this always allow option then the connection time is stored for the system.
           * This setting is the time in ms within which a subsequent connection from an always
           * allowed system is allowed to reconnect without user interaction.
           *
           * Type: long
           *
           * @hide
           */
          public static final String ADB_ALLOWED_CONNECTION_TIME =
                  "adb_allowed_connection_time";
  
          /**
           * Get the key that retrieves a bluetooth headset's priority.
           * @hide
           */
          public static final String getBluetoothHeadsetPriorityKey(String address) {
              return BLUETOOTH_HEADSET_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth a2dp sink's priority.
           * @hide
           */
          public static final String getBluetoothA2dpSinkPriorityKey(String address) {
              return BLUETOOTH_A2DP_SINK_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth a2dp src's priority.
           * @hide
           */
          public static final String getBluetoothA2dpSrcPriorityKey(String address) {
              return BLUETOOTH_A2DP_SRC_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth a2dp device's ability to support optional codecs.
           * @hide
           */
          public static final String getBluetoothA2dpSupportsOptionalCodecsKey(String address) {
              return BLUETOOTH_A2DP_SUPPORTS_OPTIONAL_CODECS_PREFIX +
                      address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves whether a bluetooth a2dp device should have optional codecs
           * enabled.
           * @hide
           */
          public static final String getBluetoothA2dpOptionalCodecsEnabledKey(String address) {
              return BLUETOOTH_A2DP_OPTIONAL_CODECS_ENABLED_PREFIX +
                      address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth Input Device's priority.
           * @hide
           */
          public static final String getBluetoothHidHostPriorityKey(String address) {
              return BLUETOOTH_INPUT_DEVICE_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth pan client priority.
           * @hide
           */
          public static final String getBluetoothPanPriorityKey(String address) {
              return BLUETOOTH_PAN_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth hearing aid priority.
           * @hide
           */
          public static final String getBluetoothHearingAidPriorityKey(String address) {
              return BLUETOOTH_HEARING_AID_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth map priority.
           * @hide
           */
          public static final String getBluetoothMapPriorityKey(String address) {
              return BLUETOOTH_MAP_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth map client priority.
           * @hide
           */
          public static final String getBluetoothMapClientPriorityKey(String address) {
              return BLUETOOTH_MAP_CLIENT_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth pbap client priority.
           * @hide
           */
          public static final String getBluetoothPbapClientPriorityKey(String address) {
              return BLUETOOTH_PBAP_CLIENT_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Get the key that retrieves a bluetooth sap priority.
           * @hide
           */
          public static final String getBluetoothSapPriorityKey(String address) {
              return BLUETOOTH_SAP_PRIORITY_PREFIX + address.toUpperCase(Locale.ROOT);
          }
  
          /**
           * Scaling factor for normal window animations. Setting to 0 will
           * disable window animations.
           */
          public static final String WINDOW_ANIMATION_SCALE = "window_animation_scale";
  
          /**
           * Scaling factor for activity transition animations. Setting to 0 will
           * disable window animations.
           */
          public static final String TRANSITION_ANIMATION_SCALE = "transition_animation_scale";
  
          /**
           * Scaling factor for Animator-based animations. This affects both the
           * start delay and duration of all such animations. Setting to 0 will
           * cause animations to end immediately. The default value is 1.
           */
          public static final String ANIMATOR_DURATION_SCALE = "animator_duration_scale";
  
          /**
           * Scaling factor for normal window animations. Setting to 0 will
           * disable window animations.
           *
           * @hide
           */
          public static final String FANCY_IME_ANIMATIONS = "fancy_ime_animations";
  
          /**
           * If 0, the compatibility mode is off for all applications.
           * If 1, older applications run under compatibility mode.
           * TODO: remove this settings before code freeze (bug/1907571)
           * @hide
           */
          public static final String COMPATIBILITY_MODE = "compatibility_mode";
  
          /**
           * CDMA only settings
           * Emergency Tone  0 = Off
           *                 1 = Alert
           *                 2 = Vibrate
           * @hide
           */
          public static final String EMERGENCY_TONE = "emergency_tone";
  
          private static final Validator EMERGENCY_TONE_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[] {"0", "1", "2"});
  
          /**
           * CDMA only settings
           * Whether the auto retry is enabled. The value is
           * boolean (1 or 0).
           * @hide
           */
          public static final String CALL_AUTO_RETRY = "call_auto_retry";
  
          private static final Validator CALL_AUTO_RETRY_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * A setting that can be read whether the emergency affordance is currently needed.
           * The value is a boolean (1 or 0).
           * @hide
           */
          public static final String EMERGENCY_AFFORDANCE_NEEDED = "emergency_affordance_needed";
  
          /**
           * Whether to enable automatic system server heap dumps. This only works on userdebug or
           * eng builds, not on user builds. This is set by the user and overrides the config value.
           * 1 means enable, 0 means disable.
           *
           * @hide
           */
          public static final String ENABLE_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS =
                  "enable_automatic_system_server_heap_dumps";
  
          private static final Validator ENABLE_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[] {"0", "1"});
  
          /**
           * See RIL_PreferredNetworkType in ril.h
           * @hide
           */
          @UnsupportedAppUsage
          public static final String PREFERRED_NETWORK_MODE =
                  "preferred_network_mode";
  
          /**
           * Name of an application package to be debugged.
           */
          public static final String DEBUG_APP = "debug_app";
  
          /**
           * If 1, when launching DEBUG_APP it will wait for the debugger before
           * starting user code.  If 0, it will run normally.
           */
          public static final String WAIT_FOR_DEBUGGER = "wait_for_debugger";
  
          /**
           * Allow GPU debug layers?
           * 0 = no
           * 1 = yes
           * @hide
           */
          public static final String ENABLE_GPU_DEBUG_LAYERS = "enable_gpu_debug_layers";
  
          /**
           * App allowed to load GPU debug layers
           * @hide
           */
          public static final String GPU_DEBUG_APP = "gpu_debug_app";
  
          /**
           * Package containing ANGLE libraries other than system, which are only available
           * to dumpable apps that opt-in.
           * @hide
           */
          public static final String GLOBAL_SETTINGS_ANGLE_DEBUG_PACKAGE =
                  "angle_debug_package";
  
          /**
           * Force all PKGs to use ANGLE, regardless of any other settings
           * The value is a boolean (1 or 0).
           * @hide
           */
          public static final String GLOBAL_SETTINGS_ANGLE_GL_DRIVER_ALL_ANGLE =
                  "angle_gl_driver_all_angle";
  
          /**
           * List of PKGs that have an OpenGL driver selected
           * @hide
           */
          public static final String GLOBAL_SETTINGS_ANGLE_GL_DRIVER_SELECTION_PKGS =
                  "angle_gl_driver_selection_pkgs";
  
          /**
           * List of selected OpenGL drivers, corresponding to the PKGs in GLOBAL_SETTINGS_DRIVER_PKGS
           * @hide
           */
          public static final String GLOBAL_SETTINGS_ANGLE_GL_DRIVER_SELECTION_VALUES =
                  "angle_gl_driver_selection_values";
  
          /**
           * List of package names that should check ANGLE rules
           * @hide
           */
          public static final String GLOBAL_SETTINGS_ANGLE_WHITELIST =
                  "angle_whitelist";
  
          /**
           * Show the "ANGLE In Use" dialog box to the user when ANGLE is the OpenGL driver.
           * The value is a boolean (1 or 0).
           * @hide
           */
          public static final String GLOBAL_SETTINGS_SHOW_ANGLE_IN_USE_DIALOG_BOX =
                  "show_angle_in_use_dialog_box";
  
          /**
           * Game Driver global preference for all Apps.
           * 0 = Default
           * 1 = All Apps use Game Driver
           * 2 = All Apps use system graphics driver
           * @hide
           */
          public static final String GAME_DRIVER_ALL_APPS = "game_driver_all_apps";
  
          /**
           * List of Apps selected to use Game Driver.
           * i.e. <pkg1>,<pkg2>,...,<pkgN>
           * @hide
           */
          public static final String GAME_DRIVER_OPT_IN_APPS = "game_driver_opt_in_apps";
  
          /**
           * List of Apps selected to use prerelease Game Driver.
           * i.e. <pkg1>,<pkg2>,...,<pkgN>
           * @hide
           */
          public static final String GAME_DRIVER_PRERELEASE_OPT_IN_APPS =
                  "game_driver_prerelease_opt_in_apps";
  
          /**
           * List of Apps selected not to use Game Driver.
           * i.e. <pkg1>,<pkg2>,...,<pkgN>
           * @hide
           */
          public static final String GAME_DRIVER_OPT_OUT_APPS = "game_driver_opt_out_apps";
  
          /**
           * Apps on the blacklist that are forbidden to use Game Driver.
           * @hide
           */
          public static final String GAME_DRIVER_BLACKLIST = "game_driver_blacklist";
  
          /**
           * List of blacklists, each blacklist is a blacklist for a specific version of Game Driver.
           * @hide
           */
          public static final String GAME_DRIVER_BLACKLISTS = "game_driver_blacklists";
  
          /**
           * Apps on the whitelist that are allowed to use Game Driver.
           * The string is a list of application package names, seperated by comma.
           * i.e. <apk1>,<apk2>,...,<apkN>
           * @hide
           */
          public static final String GAME_DRIVER_WHITELIST = "game_driver_whitelist";
  
          /**
           * List of libraries in sphal accessible by Game Driver
           * The string is a list of library names, separated by colon.
           * i.e. <lib1>:<lib2>:...:<libN>
           * @hide
           */
          public static final String GAME_DRIVER_SPHAL_LIBRARIES = "game_driver_sphal_libraries";
  
          /**
           * Ordered GPU debug layer list for Vulkan
           * i.e. <layer1>:<layer2>:...:<layerN>
           * @hide
           */
          public static final String GPU_DEBUG_LAYERS = "gpu_debug_layers";
  
          /**
           * Ordered GPU debug layer list for GLES
           * i.e. <layer1>:<layer2>:...:<layerN>
           * @hide
           */
          public static final String GPU_DEBUG_LAYERS_GLES = "gpu_debug_layers_gles";
  
          /**
           * Addition app for GPU layer discovery
           * @hide
           */
          public static final String GPU_DEBUG_LAYER_APP = "gpu_debug_layer_app";
  
          /**
           * Control whether the process CPU usage meter should be shown.
           *
           * @deprecated This functionality is no longer available as of
           * {@link android.os.Build.VERSION_CODES#N_MR1}.
           */
          @Deprecated
          public static final String SHOW_PROCESSES = "show_processes";
  
          /**
           * If 1 low power mode (aka battery saver) is enabled.
           * @hide
           */
          @TestApi
          public static final String LOW_POWER_MODE = "low_power";
  
          /**
           * If 1, battery saver ({@link #LOW_POWER_MODE}) will be re-activated after the device
           * is unplugged from a charger or rebooted.
           * @hide
           */
          @TestApi
          public static final String LOW_POWER_MODE_STICKY = "low_power_sticky";
  
          /**
           * When a device is unplugged from a changer (or is rebooted), do not re-activate battery
           * saver even if {@link #LOW_POWER_MODE_STICKY} is 1, if the battery level is equal to or
           * above this threshold.
           *
           * @hide
           */
          public static final String LOW_POWER_MODE_STICKY_AUTO_DISABLE_LEVEL =
                  "low_power_sticky_auto_disable_level";
  
          private static final Validator LOW_POWER_MODE_STICKY_AUTO_DISABLE_LEVEL_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 100);
  
          /**
           * Whether sticky battery saver should be deactivated once the battery level has reached the
           * threshold specified by {@link #LOW_POWER_MODE_STICKY_AUTO_DISABLE_LEVEL}.
           *
           * @hide
           */
          public static final String LOW_POWER_MODE_STICKY_AUTO_DISABLE_ENABLED =
                  "low_power_sticky_auto_disable_enabled";
  
          private static final Validator LOW_POWER_MODE_STICKY_AUTO_DISABLE_ENABLED_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[] {"0", "1"});
  
          /**
           * Battery level [1-100] at which low power mode automatically turns on.
           * If 0, it will not automatically turn on. For Q and newer, it will only automatically
           * turn on if the value is greater than 0 and the {@link #AUTOMATIC_POWER_SAVE_MODE}
           * setting is also set to
           * {@link android.os.PowerManager.AutoPowerSaveMode#POWER_SAVE_MODE_TRIGGER_PERCENTAGE}.
           * @see #AUTOMATIC_POWER_SAVE_MODE
           * @see android.os.PowerManager#getPowerSaveModeTrigger()
           * @hide
           */
          public static final String LOW_POWER_MODE_TRIGGER_LEVEL = "low_power_trigger_level";
  
          private static final Validator LOW_POWER_MODE_TRIGGER_LEVEL_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 100);
  
          /**
           * Whether battery saver is currently set to trigger based on percentage, dynamic power
           * savings trigger, or none. See {@link AutoPowerSaveModeTriggers} for
           * accepted values.
           *
           *  @hide
           */
          @TestApi
          public static final String AUTOMATIC_POWER_SAVE_MODE = "automatic_power_save_mode";
  
          private static final Validator AUTOMATIC_POWER_SAVE_MODE_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[] {"0", "1"});
  
          /**
           * The setting that backs the disable threshold for the setPowerSavingsWarning api in
           * PowerManager
           *
           * @see android.os.PowerManager#setDynamicPowerSaveHint(boolean, int)
           * @hide
           */
          @TestApi
          public static final String DYNAMIC_POWER_SAVINGS_DISABLE_THRESHOLD =
                  "dynamic_power_savings_disable_threshold";
          private static final Validator DYNAMIC_POWER_SAVINGS_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 100);
  
          /**
           * The setting which backs the setDynamicPowerSaveHint api in PowerManager.
           *
           * @see android.os.PowerManager#setDynamicPowerSaveHint(boolean, int)
           * @hide
           */
          @TestApi
          public static final String DYNAMIC_POWER_SAVINGS_ENABLED = "dynamic_power_savings_enabled";
  
          /**
           * A long value indicating how much longer the system battery is estimated to last in
           * millis. See {@link #BATTERY_ESTIMATES_LAST_UPDATE_TIME} for the last time this value
           * was updated.
           *
           * @hide
           */
          public static final String TIME_REMAINING_ESTIMATE_MILLIS =
                  "time_remaining_estimate_millis";
  
          /**
           * A boolean indicating whether {@link #TIME_REMAINING_ESTIMATE_MILLIS} is based customized
           * to the devices usage or using global models. See
           * {@link #BATTERY_ESTIMATES_LAST_UPDATE_TIME} for the last time this value was updated.
           *
           * @hide
           */
          public static final String TIME_REMAINING_ESTIMATE_BASED_ON_USAGE =
                  "time_remaining_estimate_based_on_usage";
  
          /**
           * A long value indicating how long the system battery takes to deplete from 100% to 0% on
           * average based on historical drain rates. See {@link #BATTERY_ESTIMATES_LAST_UPDATE_TIME}
           * for the last time this value was updated.
           *
           * @hide
           */
          public static final String AVERAGE_TIME_TO_DISCHARGE = "average_time_to_discharge";
  
          /**
           * A long indicating the epoch time in milliseconds when
           * {@link #TIME_REMAINING_ESTIMATE_MILLIS}, {@link #TIME_REMAINING_ESTIMATE_BASED_ON_USAGE},
           * and {@link #AVERAGE_TIME_TO_DISCHARGE} were last updated.
           *
           * @hide
           */
          public static final String BATTERY_ESTIMATES_LAST_UPDATE_TIME =
                  "battery_estimates_last_update_time";
  
          /**
           * The max value for {@link #LOW_POWER_MODE_TRIGGER_LEVEL}. If this setting is not set
           * or the value is 0, the default max will be used.
           *
           * @hide
           */
          public static final String LOW_POWER_MODE_TRIGGER_LEVEL_MAX = "low_power_trigger_level_max";
  
          /**
           * See com.android.settingslib.fuelgauge.BatterySaverUtils.
           * @hide
           */
          public static final String LOW_POWER_MODE_SUGGESTION_PARAMS =
                  "low_power_mode_suggestion_params";
  
          /**
           * If not 0, the activity manager will aggressively finish activities and
           * processes as soon as they are no longer needed.  If 0, the normal
           * extended lifetime is used.
           */
          public static final String ALWAYS_FINISH_ACTIVITIES = "always_finish_activities";
  
          /**
           * If nonzero, all system error dialogs will be hidden.  For example, the
           * crash and ANR dialogs will not be shown, and the system will just proceed
           * as if they had been accepted by the user.
           * @hide
           */
          public static final String HIDE_ERROR_DIALOGS = "hide_error_dialogs";
  
          /**
           * Use Dock audio output for media:
           *      0 = disabled
           *      1 = enabled
           * @hide
           */
          public static final String DOCK_AUDIO_MEDIA_ENABLED = "dock_audio_media_enabled";
  
          private static final Validator DOCK_AUDIO_MEDIA_ENABLED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * The surround sound formats AC3, DTS or IEC61937 are
           * available for use if they are detected.
           * This is the default mode.
           *
           * Note that AUTO is equivalent to ALWAYS for Android TVs and other
           * devices that have an S/PDIF output. This is because S/PDIF
           * is unidirectional and the TV cannot know if a decoder is
           * connected. So it assumes they are always available.
           * @hide
           */
           public static final int ENCODED_SURROUND_OUTPUT_AUTO = 0;
  
          /**
           * AC3, DTS or IEC61937 are NEVER available, even if they
           * are detected by the hardware. Those formats will not be
           * reported.
           *
           * An example use case would be an AVR reports that it is capable of
           * surround sound decoding but is broken. If NEVER is chosen
           * then apps must use PCM output instead of encoded output.
           * @hide
           */
           public static final int ENCODED_SURROUND_OUTPUT_NEVER = 1;
  
          /**
           * AC3, DTS or IEC61937 are ALWAYS available, even if they
           * are not detected by the hardware. Those formats will be
           * reported as part of the HDMI output capability. Applications
           * are then free to use either PCM or encoded output.
           *
           * An example use case would be a when TV was connected over
           * TOS-link to an AVR. But the TV could not see it because TOS-link
           * is unidirectional.
           * @hide
           */
           public static final int ENCODED_SURROUND_OUTPUT_ALWAYS = 2;
  
          /**
           * Surround sound formats are available according to the choice
           * of user, even if they are not detected by the hardware. Those
           * formats will be reported as part of the HDMI output capability.
           * Applications are then free to use either PCM or encoded output.
           *
           * An example use case would be an AVR that doesn't report a surround
           * format while the user knows the AVR does support it.
           * @hide
           */
          public static final int ENCODED_SURROUND_OUTPUT_MANUAL = 3;
  
          /**
           * Set to ENCODED_SURROUND_OUTPUT_AUTO,
           * ENCODED_SURROUND_OUTPUT_NEVER,
           * ENCODED_SURROUND_OUTPUT_ALWAYS or
           * ENCODED_SURROUND_OUTPUT_MANUAL
           * @hide
           */
          public static final String ENCODED_SURROUND_OUTPUT = "encoded_surround_output";
  
          private static final Validator ENCODED_SURROUND_OUTPUT_VALIDATOR =
                  new SettingsValidators.DiscreteValueValidator(new String[] {"0", "1", "2", "3"});
  
          /**
           * Surround sounds formats that are enabled when ENCODED_SURROUND_OUTPUT is set to
           * ENCODED_SURROUND_OUTPUT_MANUAL. Encoded as comma separated list. Allowed values
           * are the format constants defined in AudioFormat.java. Ex:
           *
           * "5,6"
           *
           * @hide
           */
          public static final String ENCODED_SURROUND_OUTPUT_ENABLED_FORMATS =
                  "encoded_surround_output_enabled_formats";
  
          private static final Validator ENCODED_SURROUND_OUTPUT_ENABLED_FORMATS_VALIDATOR =
                  new Validator() {
              @Override
              public boolean validate(@Nullable String value) {
                  try {
                      String[] surroundFormats = TextUtils.split(value, ",");
                      for (String format : surroundFormats) {
                          int audioFormat = Integer.valueOf(format);
                          boolean isSurroundFormat = false;
                          for (int sf : AudioFormat.SURROUND_SOUND_ENCODING) {
                              if (sf == audioFormat) {
                                  isSurroundFormat = true;
                                  break;
                              }
                          }
                          if (!isSurroundFormat) {
                              return false;
                          }
                      }
                      return true;
                  } catch (NumberFormatException e) {
                      return false;
                  }
              }
          };
  
          /**
           * Persisted safe headphone volume management state by AudioService
           * @hide
           */
          public static final String AUDIO_SAFE_VOLUME_STATE = "audio_safe_volume_state";
  
          /**
           * URL for tzinfo (time zone) updates
           * @hide
           */
          public static final String TZINFO_UPDATE_CONTENT_URL = "tzinfo_content_url";
  
          /**
           * URL for tzinfo (time zone) update metadata
           * @hide
           */
          public static final String TZINFO_UPDATE_METADATA_URL = "tzinfo_metadata_url";
  
          /**
           * URL for selinux (mandatory access control) updates
           * @hide
           */
          public static final String SELINUX_UPDATE_CONTENT_URL = "selinux_content_url";
  
          /**
           * URL for selinux (mandatory access control) update metadata
           * @hide
           */
          public static final String SELINUX_UPDATE_METADATA_URL = "selinux_metadata_url";
  
          /**
           * URL for sms short code updates
           * @hide
           */
          public static final String SMS_SHORT_CODES_UPDATE_CONTENT_URL =
                  "sms_short_codes_content_url";
  
          /**
           * URL for sms short code update metadata
           * @hide
           */
          public static final String SMS_SHORT_CODES_UPDATE_METADATA_URL =
                  "sms_short_codes_metadata_url";
  
          /**
           * URL for apn_db updates
           * @hide
           */
          public static final String APN_DB_UPDATE_CONTENT_URL = "apn_db_content_url";
  
          /**
           * URL for apn_db update metadata
           * @hide
           */
          public static final String APN_DB_UPDATE_METADATA_URL = "apn_db_metadata_url";
  
          /**
           * URL for cert pinlist updates
           * @hide
           */
          public static final String CERT_PIN_UPDATE_CONTENT_URL = "cert_pin_content_url";
  
          /**
           * URL for cert pinlist updates
           * @hide
           */
          public static final String CERT_PIN_UPDATE_METADATA_URL = "cert_pin_metadata_url";
  
          /**
           * URL for intent firewall updates
           * @hide
           */
          public static final String INTENT_FIREWALL_UPDATE_CONTENT_URL =
                  "intent_firewall_content_url";
  
          /**
           * URL for intent firewall update metadata
           * @hide
           */
          public static final String INTENT_FIREWALL_UPDATE_METADATA_URL =
                  "intent_firewall_metadata_url";
  
          /**
           * URL for lang id model updates
           * @hide
           */
          public static final String LANG_ID_UPDATE_CONTENT_URL = "lang_id_content_url";
  
          /**
           * URL for lang id model update metadata
           * @hide
           */
          public static final String LANG_ID_UPDATE_METADATA_URL = "lang_id_metadata_url";
  
          /**
           * URL for smart selection model updates
           * @hide
           */
          public static final String SMART_SELECTION_UPDATE_CONTENT_URL =
                  "smart_selection_content_url";
  
          /**
           * URL for smart selection model update metadata
           * @hide
           */
          public static final String SMART_SELECTION_UPDATE_METADATA_URL =
                  "smart_selection_metadata_url";
  
          /**
           * URL for conversation actions model updates
           * @hide
           */
          public static final String CONVERSATION_ACTIONS_UPDATE_CONTENT_URL =
                  "conversation_actions_content_url";
  
          /**
           * URL for conversation actions model update metadata
           * @hide
           */
          public static final String CONVERSATION_ACTIONS_UPDATE_METADATA_URL =
                  "conversation_actions_metadata_url";
  
          /**
           * SELinux enforcement status. If 0, permissive; if 1, enforcing.
           * @hide
           */
          public static final String SELINUX_STATUS = "selinux_status";
  
          /**
           * Developer setting to force RTL layout.
           * @hide
           */
          public static final String DEVELOPMENT_FORCE_RTL = "debug.force_rtl";
  
          /**
           * Milliseconds after screen-off after which low battery sounds will be silenced.
           *
           * If zero, battery sounds will always play.
           * Defaults to @integer/def_low_battery_sound_timeout in SettingsProvider.
           *
           * @hide
           */
          public static final String LOW_BATTERY_SOUND_TIMEOUT = "low_battery_sound_timeout";
  
          /**
           * Milliseconds to wait before bouncing Wi-Fi after settings is restored. Note that after
           * the caller is done with this, they should call {@link ContentResolver#delete} to
           * clean up any value that they may have written.
           *
           * @hide
           */
          public static final String WIFI_BOUNCE_DELAY_OVERRIDE_MS = "wifi_bounce_delay_override_ms";
  
          /**
           * Defines global runtime overrides to window policy.
           *
           * See {@link com.android.server.wm.PolicyControl} for value format.
           *
           * @hide
           */
          public static final String POLICY_CONTROL = "policy_control";
  
          /**
           * {@link android.view.DisplayCutout DisplayCutout} emulation mode.
           *
           * @hide
           */
          public static final String EMULATE_DISPLAY_CUTOUT = "emulate_display_cutout";
  
          /** @hide */ public static final int EMULATE_DISPLAY_CUTOUT_OFF = 0;
          /** @hide */ public static final int EMULATE_DISPLAY_CUTOUT_ON = 1;
  
          /**
           * A colon separated list of keys for Settings Slices.
           *
           * @hide
           */
          public static final String BLOCKED_SLICES = "blocked_slices";
  
          /**
           * Defines global zen mode.  ZEN_MODE_OFF, ZEN_MODE_IMPORTANT_INTERRUPTIONS,
           * or ZEN_MODE_NO_INTERRUPTIONS.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ZEN_MODE = "zen_mode";
  
          /** @hide */
          @UnsupportedAppUsage
          public static final int ZEN_MODE_OFF = 0;
          /** @hide */
          @UnsupportedAppUsage
          public static final int ZEN_MODE_IMPORTANT_INTERRUPTIONS = 1;
          /** @hide */
          @UnsupportedAppUsage
          public static final int ZEN_MODE_NO_INTERRUPTIONS = 2;
          /** @hide */
          @UnsupportedAppUsage
          public static final int ZEN_MODE_ALARMS = 3;
  
          /** @hide */ public static String zenModeToString(int mode) {
              if (mode == ZEN_MODE_IMPORTANT_INTERRUPTIONS) return "ZEN_MODE_IMPORTANT_INTERRUPTIONS";
              if (mode == ZEN_MODE_ALARMS) return "ZEN_MODE_ALARMS";
              if (mode == ZEN_MODE_NO_INTERRUPTIONS) return "ZEN_MODE_NO_INTERRUPTIONS";
              return "ZEN_MODE_OFF";
          }
  
          /** @hide */ public static boolean isValidZenMode(int value) {
              switch (value) {
                  case Global.ZEN_MODE_OFF:
                  case Global.ZEN_MODE_IMPORTANT_INTERRUPTIONS:
                  case Global.ZEN_MODE_ALARMS:
                  case Global.ZEN_MODE_NO_INTERRUPTIONS:
                      return true;
                  default:
                      return false;
              }
          }
  
          /**
           * Value of the ringer before entering zen mode.
           *
           * @hide
           */
          public static final String ZEN_MODE_RINGER_LEVEL = "zen_mode_ringer_level";
  
          /**
           * Opaque value, changes when persisted zen mode configuration changes.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String ZEN_MODE_CONFIG_ETAG = "zen_mode_config_etag";
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#ZEN_DURATION} instead
           * @hide
           */
          @Deprecated
          public static final String ZEN_DURATION = "zen_duration";
  
          private static final Validator ZEN_DURATION_VALIDATOR = ANY_INTEGER_VALIDATOR;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#ZEN_DURATION_PROMPT} instead
           * @hide
           */
          @Deprecated
          public static final int ZEN_DURATION_PROMPT = -1;
  
          /**
           * @deprecated Use {@link android.provider.Settings.Secure#ZEN_DURATION_FOREVER} instead
           * @hide
           */
          @Deprecated
          public static final int ZEN_DURATION_FOREVER = 0;
  
          /**
           * Defines global heads up toggle.  One of HEADS_UP_OFF, HEADS_UP_ON.
           *
           * @hide
           */
          @UnsupportedAppUsage
          public static final String HEADS_UP_NOTIFICATIONS_ENABLED =
                  "heads_up_notifications_enabled";
  
          /** @hide */
          @UnsupportedAppUsage
          public static final int HEADS_UP_OFF = 0;
          /** @hide */
          @UnsupportedAppUsage
          public static final int HEADS_UP_ON = 1;
  
          /**
           * The name of the device
           */
          public static final String DEVICE_NAME = "device_name";
  
          /**
           * Whether the NetworkScoringService has been first initialized.
           * <p>
           * Type: int (0 for false, 1 for true)
           * @hide
           */
          public static final String NETWORK_SCORING_PROVISIONED = "network_scoring_provisioned";
  
          /**
           * Indicates whether the user wants to be prompted for password to decrypt the device on
           * boot. This only matters if the storage is encrypted.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          public static final String REQUIRE_PASSWORD_TO_DECRYPT = "require_password_to_decrypt";
  
          /**
           * Whether the Volte is enabled. If this setting is not set then we use the Carrier Config
           * value {@link CarrierConfigManager#KEY_ENHANCED_4G_LTE_ON_BY_DEFAULT_BOOL}.
           * <p>
           * Type: int (0 for false, 1 for true)
           * @hide
           * @deprecated Use {@link android.telephony.SubscriptionManager#ENHANCED_4G_MODE_ENABLED}
           * instead.
           */
          @Deprecated
          public static final String ENHANCED_4G_MODE_ENABLED =
                  SubscriptionManager.ENHANCED_4G_MODE_ENABLED;
  
          /**
           * Whether VT (Video Telephony over IMS) is enabled
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           * @deprecated Use {@link android.telephony.SubscriptionManager#VT_IMS_ENABLED} instead.
           */
          @Deprecated
          public static final String VT_IMS_ENABLED = SubscriptionManager.VT_IMS_ENABLED;
  
          /**
           * Whether WFC is enabled
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           * @deprecated Use {@link android.telephony.SubscriptionManager#WFC_IMS_ENABLED} instead.
           */
          @Deprecated
          public static final String WFC_IMS_ENABLED = SubscriptionManager.WFC_IMS_ENABLED;
  
          /**
           * WFC mode on home/non-roaming network.
           * <p>
           * Type: int - 2=Wi-Fi preferred, 1=Cellular preferred, 0=Wi-Fi only
           *
           * @hide
           * @deprecated Use {@link android.telephony.SubscriptionManager#WFC_IMS_MODE} instead.
           */
          @Deprecated
          public static final String WFC_IMS_MODE = SubscriptionManager.WFC_IMS_MODE;
  
          /**
           * WFC mode on roaming network.
           * <p>
           * Type: int - see {@link #WFC_IMS_MODE} for values
           *
           * @hide
           * @deprecated Use {@link android.telephony.SubscriptionManager#WFC_IMS_ROAMING_MODE}
           * instead.
           */
          @Deprecated
          public static final String WFC_IMS_ROAMING_MODE = SubscriptionManager.WFC_IMS_ROAMING_MODE;
  
          /**
           * Whether WFC roaming is enabled
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           * @deprecated Use {@link android.telephony.SubscriptionManager#WFC_IMS_ROAMING_ENABLED}
           * instead
           */
          @Deprecated
          public static final String WFC_IMS_ROAMING_ENABLED =
                  SubscriptionManager.WFC_IMS_ROAMING_ENABLED;
  
          /**
           * Whether user can enable/disable LTE as a preferred network. A carrier might control
           * this via gservices, OMA-DM, carrier app, etc.
           * <p>
           * Type: int (0 for false, 1 for true)
           * @hide
           */
          public static final String LTE_SERVICE_FORCED = "lte_service_forced";
  
  
          /**
           * Specifies the behaviour the lid triggers when closed
           * <p>
           * See WindowManagerPolicy.WindowManagerFuncs
           * @hide
           */
          public static final String LID_BEHAVIOR = "lid_behavior";
  
          /**
           * Ephemeral app cookie max size in bytes.
           * <p>
           * Type: int
           * @hide
           */
          public static final String EPHEMERAL_COOKIE_MAX_SIZE_BYTES =
                  "ephemeral_cookie_max_size_bytes";
  
          /**
           * Toggle to enable/disable the entire ephemeral feature. By default, ephemeral is
           * enabled. Set to zero to disable.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          public static final String ENABLE_EPHEMERAL_FEATURE = "enable_ephemeral_feature";
  
          /**
           * Toggle to enable/disable dexopt for instant applications. The default is for dexopt
           * to be disabled.
           * <p>
           * Type: int (0 to disable, 1 to enable)
           *
           * @hide
           */
          public static final String INSTANT_APP_DEXOPT_ENABLED = "instant_app_dexopt_enabled";
  
          /**
           * The min period for caching installed instant apps in milliseconds.
           * <p>
           * Type: long
           * @hide
           */
          public static final String INSTALLED_INSTANT_APP_MIN_CACHE_PERIOD =
                  "installed_instant_app_min_cache_period";
  
          /**
           * The max period for caching installed instant apps in milliseconds.
           * <p>
           * Type: long
           * @hide
           */
          public static final String INSTALLED_INSTANT_APP_MAX_CACHE_PERIOD =
                  "installed_instant_app_max_cache_period";
  
          /**
           * The min period for caching uninstalled instant apps in milliseconds.
           * <p>
           * Type: long
           * @hide
           */
          public static final String UNINSTALLED_INSTANT_APP_MIN_CACHE_PERIOD =
                  "uninstalled_instant_app_min_cache_period";
  
          /**
           * The max period for caching uninstalled instant apps in milliseconds.
           * <p>
           * Type: long
           * @hide
           */
          public static final String UNINSTALLED_INSTANT_APP_MAX_CACHE_PERIOD =
                  "uninstalled_instant_app_max_cache_period";
  
          /**
           * The min period for caching unused static shared libs in milliseconds.
           * <p>
           * Type: long
           * @hide
           */
          public static final String UNUSED_STATIC_SHARED_LIB_MIN_CACHE_PERIOD =
                  "unused_static_shared_lib_min_cache_period";
  
          /**
           * Allows switching users when system user is locked.
           * <p>
           * Type: int
           * @hide
           */
          public static final String ALLOW_USER_SWITCHING_WHEN_SYSTEM_USER_LOCKED =
                  "allow_user_switching_when_system_user_locked";
  
          /**
           * Boot count since the device starts running API level 24.
           * <p>
           * Type: int
           */
          public static final String BOOT_COUNT = "boot_count";
  
          /**
           * Whether the safe boot is disallowed.
           *
           * <p>This setting should have the identical value as the corresponding user restriction.
           * The purpose of the setting is to make the restriction available in early boot stages
           * before the user restrictions are loaded.
           * @hide
           */
          public static final String SAFE_BOOT_DISALLOWED = "safe_boot_disallowed";
  
          /**
           * Indicates whether this device is currently in retail demo mode. If true, the device
           * usage is severely limited.
           * <p>
           * Type: int (0 for false, 1 for true)
           *
           * @hide
           */
          @SystemApi
          public static final String DEVICE_DEMO_MODE = "device_demo_mode";
  
          /**
           * Indicates the maximum time that an app is blocked for the network rules to get updated.
           *
           * Type: long
           *
           * @hide
           */
          public static final String NETWORK_ACCESS_TIMEOUT_MS = "network_access_timeout_ms";
  
          /**
           * The reason for the settings database being downgraded. This is only for
           * troubleshooting purposes and its value should not be interpreted in any way.
           *
           * Type: string
           *
           * @hide
           */
          public static final String DATABASE_DOWNGRADE_REASON = "database_downgrade_reason";
  
          /**
           * The build id of when the settings database was first created (or re-created due it
           * being missing).
           *
           * Type: string
           *
           * @hide
           */
          public static final String DATABASE_CREATION_BUILDID = "database_creation_buildid";
  
          /**
           * Flag to toggle journal mode WAL on or off for the contacts database. WAL is enabled by
           * default. Set to 0 to disable.
           *
           * @hide
           */
          public static final String CONTACTS_DATABASE_WAL_ENABLED = "contacts_database_wal_enabled";
  
          /**
           * Flag to enable the link to location permissions in location setting. Set to 0 to disable.
           *
           * @hide
           */
          public static final String LOCATION_SETTINGS_LINK_TO_PERMISSIONS_ENABLED =
                  "location_settings_link_to_permissions_enabled";
  
          /**
           * Flag to set the waiting time for removing invisible euicc profiles inside System >
           * Settings.
           * Type: long
           *
           * @hide
           */
          public static final String EUICC_REMOVING_INVISIBLE_PROFILES_TIMEOUT_MILLIS =
                  "euicc_removing_invisible_profiles_timeout_millis";
  
          /**
           * Flag to set the waiting time for euicc factory reset inside System > Settings
           * Type: long
           *
           * @hide
           */
          public static final String EUICC_FACTORY_RESET_TIMEOUT_MILLIS =
                  "euicc_factory_reset_timeout_millis";
  
          /**
           * Flag to set the timeout for when to refresh the storage settings cached data.
           * Type: long
           *
           * @hide
           */
          public static final String STORAGE_SETTINGS_CLOBBER_THRESHOLD =
                  "storage_settings_clobber_threshold";
  
          /**
           * If set to 1, {@link Secure#LOCATION_MODE} will be set to {@link Secure#LOCATION_MODE_OFF}
           * temporarily for all users.
           *
           * @hide
           */
          @TestApi
          public static final String LOCATION_GLOBAL_KILL_SWITCH =
                  "location_global_kill_switch";
  
          /**
           * If set to 1, SettingsProvider's restoreAnyVersion="true" attribute will be ignored
           * and restoring to lower version of platform API will be skipped.
           *
           * @hide
           */
          public static final String OVERRIDE_SETTINGS_PROVIDER_RESTORE_ANY_VERSION =
                  "override_settings_provider_restore_any_version";
          /**
           * Flag to toggle whether system services report attribution chains when they attribute
           * battery use via a {@code WorkSource}.
           *
           * Type: int (0 to disable, 1 to enable)
           *
           * @hide
           */
          public static final String CHAINED_BATTERY_ATTRIBUTION_ENABLED =
                  "chained_battery_attribution_enabled";
  
          /**
           * The packages whitelisted to be run in autofill compatibility mode. The list
           * of packages is {@code ":"} colon delimited, and each entry has the name of the
           * package and an optional list of url bar resource ids (the list is delimited by
           * brackets&mdash{@code [} and {@code ]}&mdash and is also comma delimited).
           *
           * <p>For example, a list with 3 packages {@code p1}, {@code p2}, and {@code p3}, where
           * package {@code p1} have one id ({@code url_bar}, {@code p2} has none, and {@code p3 }
           * have 2 ids {@code url_foo} and {@code url_bas}) would be
           * {@code p1[url_bar]:p2:p3[url_foo,url_bas]}
           *
           * @hide
           */
          @SystemApi
          @TestApi
          public static final String AUTOFILL_COMPAT_MODE_ALLOWED_PACKAGES =
                  "autofill_compat_mode_allowed_packages";
  
          /**
           * Level of autofill logging.
           *
           * <p>Valid values are
           * {@link android.view.autofill.AutofillManager#NO_LOGGING},
           * {@link android.view.autofill.AutofillManager#FLAG_ADD_CLIENT_DEBUG}, or
           * {@link android.view.autofill.AutofillManager#FLAG_ADD_CLIENT_VERBOSE}.
           *
           * @hide
           */
          public static final String AUTOFILL_LOGGING_LEVEL = "autofill_logging_level";
  
          /**
           * Maximum number of partitions that can be allowed in an autofill session.
           *
           * @hide
           */
          public static final String AUTOFILL_MAX_PARTITIONS_SIZE = "autofill_max_partitions_size";
  
          /**
           * Maximum number of visible datasets in the Autofill dataset picker UI, or {@code 0} to use
           * the default value from resources.
           *
           * @hide
           */
          public static final String AUTOFILL_MAX_VISIBLE_DATASETS = "autofill_max_visible_datasets";
  
          /**
           * Exemptions to the hidden API blacklist.
           *
           * @hide
           */
          @TestApi
          public static final String HIDDEN_API_BLACKLIST_EXEMPTIONS =
                  "hidden_api_blacklist_exemptions";
  
          /**
           * Hidden API enforcement policy for apps.
           *
           * Values correspond to @{@link
           * android.content.pm.ApplicationInfo.HiddenApiEnforcementPolicy}
           *
           * @hide
           */
          public static final String HIDDEN_API_POLICY = "hidden_api_policy";
  
          /**
           * Current version of signed configuration applied.
           *
           * @hide
           */
          public static final String SIGNED_CONFIG_VERSION = "signed_config_version";
  
          /**
           * Timeout for a single {@link android.media.soundtrigger.SoundTriggerDetectionService}
           * operation (in ms).
           *
           * @hide
           */
          public static final String SOUND_TRIGGER_DETECTION_SERVICE_OP_TIMEOUT =
                  "sound_trigger_detection_service_op_timeout";
  
          /**
           * Maximum number of {@link android.media.soundtrigger.SoundTriggerDetectionService}
           * operations per day.
           *
           * @hide
           */
          public static final String MAX_SOUND_TRIGGER_DETECTION_SERVICE_OPS_PER_DAY =
                  "max_sound_trigger_detection_service_ops_per_day";
  
          /** {@hide} */
          public static final String ISOLATED_STORAGE_LOCAL = "isolated_storage_local";
          /** {@hide} */
          public static final String ISOLATED_STORAGE_REMOTE = "isolated_storage_remote";
  
          /**
           * Indicates whether aware is available in the current location.
           * @hide
           */
          public static final String AWARE_ALLOWED = "aware_allowed";
  
          private static final Validator AWARE_ALLOWED_VALIDATOR = BOOLEAN_VALIDATOR;
  
          /**
           * Overrides internal R.integer.config_longPressOnPowerBehavior.
           * Allowable values detailed in frameworks/base/core/res/res/values/config.xml.
           * Used by PhoneWindowManager.
           * @hide
           */
          public static final String POWER_BUTTON_LONG_PRESS =
                  "power_button_long_press";
          private static final Validator POWER_BUTTON_LONG_PRESS_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 5);
  
          /**
           * Overrides internal R.integer.config_veryLongPressOnPowerBehavior.
           * Allowable values detailed in frameworks/base/core/res/res/values/config.xml.
           * Used by PhoneWindowManager.
           * @hide
           */
          public static final String POWER_BUTTON_VERY_LONG_PRESS =
                  "power_button_very_long_press";
          private static final Validator POWER_BUTTON_VERY_LONG_PRESS_VALIDATOR =
                  new SettingsValidators.InclusiveIntegerRangeValidator(0, 1);
  
          /**
           * Settings to backup. This is here so that it's in the same place as the settings
           * keys and easy to update.
           *
           * These keys may be mentioned in the SETTINGS_TO_BACKUP arrays in System
           * and Secure as well.  This is because those tables drive both backup and
           * restore, and restore needs to properly whitelist keys that used to live
           * in those namespaces.  The keys will only actually be backed up / restored
           * if they are also mentioned in this table (Global.SETTINGS_TO_BACKUP).
           *
           * NOTE: Settings are backed up and restored in the order they appear
           *       in this array. If you have one setting depending on another,
           *       make sure that they are ordered appropriately.
           *
           * @hide
           */
          public static final String[] SETTINGS_TO_BACKUP = {
              APPLY_RAMPING_RINGER,
              BUGREPORT_IN_POWER_MENU,
              STAY_ON_WHILE_PLUGGED_IN,
              APP_AUTO_RESTRICTION_ENABLED,
              AUTO_TIME,
              AUTO_TIME_ZONE,
              POWER_SOUNDS_ENABLED,
              DOCK_SOUNDS_ENABLED,
              CHARGING_SOUNDS_ENABLED,
              USB_MASS_STORAGE_ENABLED,
              NETWORK_RECOMMENDATIONS_ENABLED,
              WIFI_WAKEUP_ENABLED,
              WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON,
              WIFI_CARRIER_NETWORKS_AVAILABLE_NOTIFICATION_ON,
              USE_OPEN_WIFI_PACKAGE,
              WIFI_WATCHDOG_POOR_NETWORK_TEST_ENABLED,
              EMERGENCY_TONE,
              CALL_AUTO_RETRY,
              DOCK_AUDIO_MEDIA_ENABLED,
              ENABLE_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS,
              ENCODED_SURROUND_OUTPUT,
              ENCODED_SURROUND_OUTPUT_ENABLED_FORMATS,
              LOW_POWER_MODE_TRIGGER_LEVEL,
              LOW_POWER_MODE_STICKY_AUTO_DISABLE_ENABLED,
              LOW_POWER_MODE_STICKY_AUTO_DISABLE_LEVEL,
              BLUETOOTH_ON,
              PRIVATE_DNS_MODE,
              PRIVATE_DNS_SPECIFIER,
              SOFT_AP_TIMEOUT_ENABLED,
              ZEN_DURATION,
              CHARGING_VIBRATION_ENABLED,
              AWARE_ALLOWED,
              NOTIFICATION_BUBBLES,
          };
  
          /**
           * All settings in {@link SETTINGS_TO_BACKUP} array *must* have a non-null validator,
           * otherwise they won't be restored.
           *
           * @hide
           */
          public static final Map<String, Validator> VALIDATORS = new ArrayMap<>();
          static {
              VALIDATORS.put(APPLY_RAMPING_RINGER, APPLY_RAMPING_RINGER_VALIDATOR);
              VALIDATORS.put(BUGREPORT_IN_POWER_MENU, BUGREPORT_IN_POWER_MENU_VALIDATOR);
              VALIDATORS.put(STAY_ON_WHILE_PLUGGED_IN, STAY_ON_WHILE_PLUGGED_IN_VALIDATOR);
              VALIDATORS.put(AUTO_TIME, AUTO_TIME_VALIDATOR);
              VALIDATORS.put(AUTO_TIME_ZONE, AUTO_TIME_ZONE_VALIDATOR);
              VALIDATORS.put(POWER_SOUNDS_ENABLED, POWER_SOUNDS_ENABLED_VALIDATOR);
              VALIDATORS.put(DOCK_SOUNDS_ENABLED, DOCK_SOUNDS_ENABLED_VALIDATOR);
              VALIDATORS.put(CHARGING_SOUNDS_ENABLED, CHARGING_SOUNDS_ENABLED_VALIDATOR);
              VALIDATORS.put(USB_MASS_STORAGE_ENABLED, USB_MASS_STORAGE_ENABLED_VALIDATOR);
              VALIDATORS.put(NETWORK_RECOMMENDATIONS_ENABLED,
                      NETWORK_RECOMMENDATIONS_ENABLED_VALIDATOR);
              VALIDATORS.put(WIFI_WAKEUP_ENABLED, WIFI_WAKEUP_ENABLED_VALIDATOR);
              VALIDATORS.put(WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON,
                      WIFI_NETWORKS_AVAILABLE_NOTIFICATION_ON_VALIDATOR);
              VALIDATORS.put(USE_OPEN_WIFI_PACKAGE, USE_OPEN_WIFI_PACKAGE_VALIDATOR);
              VALIDATORS.put(WIFI_WATCHDOG_POOR_NETWORK_TEST_ENABLED,
                      WIFI_WATCHDOG_POOR_NETWORK_TEST_ENABLED_VALIDATOR);
              VALIDATORS.put(EMERGENCY_TONE, EMERGENCY_TONE_VALIDATOR);
              VALIDATORS.put(CALL_AUTO_RETRY, CALL_AUTO_RETRY_VALIDATOR);
              VALIDATORS.put(DOCK_AUDIO_MEDIA_ENABLED, DOCK_AUDIO_MEDIA_ENABLED_VALIDATOR);
              VALIDATORS.put(ENABLE_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS,
                      ENABLE_AUTOMATIC_SYSTEM_SERVER_HEAP_DUMPS_VALIDATOR);
              VALIDATORS.put(ENCODED_SURROUND_OUTPUT, ENCODED_SURROUND_OUTPUT_VALIDATOR);
              VALIDATORS.put(ENCODED_SURROUND_OUTPUT_ENABLED_FORMATS,
                      ENCODED_SURROUND_OUTPUT_ENABLED_FORMATS_VALIDATOR);
              VALIDATORS.put(LOW_POWER_MODE_STICKY_AUTO_DISABLE_LEVEL,
                      LOW_POWER_MODE_STICKY_AUTO_DISABLE_LEVEL_VALIDATOR);
              VALIDATORS.put(LOW_POWER_MODE_STICKY_AUTO_DISABLE_ENABLED,
                      LOW_POWER_MODE_STICKY_AUTO_DISABLE_ENABLED_VALIDATOR);
              VALIDATORS.put(LOW_POWER_MODE_TRIGGER_LEVEL, LOW_POWER_MODE_TRIGGER_LEVEL_VALIDATOR);
              VALIDATORS.put(LOW_POWER_MODE_TRIGGER_LEVEL_MAX,
                      LOW_POWER_MODE_TRIGGER_LEVEL_VALIDATOR);
              VALIDATORS.put(AUTOMATIC_POWER_SAVE_MODE, AUTOMATIC_POWER_SAVE_MODE_VALIDATOR);
              VALIDATORS.put(DYNAMIC_POWER_SAVINGS_DISABLE_THRESHOLD,
                      DYNAMIC_POWER_SAVINGS_VALIDATOR);
              VALIDATORS.put(BLUETOOTH_ON, BLUETOOTH_ON_VALIDATOR);
              VALIDATORS.put(EUICC_UNSUPPORTED_COUNTRIES, EUICC_UNSUPPORTED_COUNTRIES_VALIDATOR);
              VALIDATORS.put(PRIVATE_DNS_MODE, PRIVATE_DNS_MODE_VALIDATOR);
              VALIDATORS.put(PRIVATE_DNS_SPECIFIER, PRIVATE_DNS_SPECIFIER_VALIDATOR);
              VALIDATORS.put(SOFT_AP_TIMEOUT_ENABLED, SOFT_AP_TIMEOUT_ENABLED_VALIDATOR);
              VALIDATORS.put(WIFI_CARRIER_NETWORKS_AVAILABLE_NOTIFICATION_ON,
                      WIFI_CARRIER_NETWORKS_AVAILABLE_NOTIFICATION_ON_VALIDATOR);
              VALIDATORS.put(WIFI_SCAN_THROTTLE_ENABLED, WIFI_SCAN_THROTTLE_ENABLED_VALIDATOR);
              VALIDATORS.put(APP_AUTO_RESTRICTION_ENABLED, APP_AUTO_RESTRICTION_ENABLED_VALIDATOR);
              VALIDATORS.put(ZEN_DURATION, ZEN_DURATION_VALIDATOR);
              VALIDATORS.put(CHARGING_VIBRATION_ENABLED, CHARGING_VIBRATION_ENABLED_VALIDATOR);
              VALIDATORS.put(DEVICE_PROVISIONING_MOBILE_DATA_ENABLED, BOOLEAN_VALIDATOR);
              VALIDATORS.put(REQUIRE_PASSWORD_TO_DECRYPT, BOOLEAN_VALIDATOR);
              VALIDATORS.put(DEVICE_DEMO_MODE, BOOLEAN_VALIDATOR);
              VALIDATORS.put(WIFI_PNO_FREQUENCY_CULLING_ENABLED,
                      WIFI_PNO_FREQUENCY_CULLING_ENABLED_VALIDATOR);
              VALIDATORS.put(WIFI_PNO_RECENCY_SORTING_ENABLED,
                      WIFI_PNO_RECENCY_SORTING_ENABLED_VALIDATOR);
              VALIDATORS.put(WIFI_LINK_PROBING_ENABLED, WIFI_LINK_PROBING_ENABLED_VALIDATOR);
              VALIDATORS.put(AWARE_ALLOWED, AWARE_ALLOWED_VALIDATOR);
              VALIDATORS.put(POWER_BUTTON_LONG_PRESS, POWER_BUTTON_LONG_PRESS_VALIDATOR);
              VALIDATORS.put(POWER_BUTTON_VERY_LONG_PRESS, POWER_BUTTON_VERY_LONG_PRESS_VALIDATOR);
              VALIDATORS.put(NOTIFICATION_BUBBLES, NOTIFICATION_BUBBLES_VALIDATOR);
          }
  
          /**
           * Global settings that shouldn't be persisted.
           *
           * @hide
           */
          public static final String[] TRANSIENT_SETTINGS = {
                  LOCATION_GLOBAL_KILL_SWITCH,
          };
  
          /**
           * Keys we no longer back up under the current schema, but want to continue to
           * process when restoring historical backup datasets.
           *
           * All settings in {@link LEGACY_RESTORE_SETTINGS} array *must* have a non-null validator,
           * otherwise they won't be restored.
           *
           * @hide
           */
          public static final String[] LEGACY_RESTORE_SETTINGS = {
          };
  
          @UnsupportedAppUsage
          private static final ContentProviderHolder sProviderHolder =
                  new ContentProviderHolder(CONTENT_URI);
  
          // Populated lazily, guarded by class object:
          @UnsupportedAppUsage
          private static final NameValueCache sNameValueCache = new NameValueCache(
                      CONTENT_URI,
                      CALL_METHOD_GET_GLOBAL,
                      CALL_METHOD_PUT_GLOBAL,
                      sProviderHolder);
  
          // Certain settings have been moved from global to the per-user secure namespace
          @UnsupportedAppUsage
          private static final HashSet<String> MOVED_TO_SECURE;
          static {
              MOVED_TO_SECURE = new HashSet<>(8);
              MOVED_TO_SECURE.add(Global.INSTALL_NON_MARKET_APPS);
              MOVED_TO_SECURE.add(Global.ZEN_DURATION);
              MOVED_TO_SECURE.add(Global.SHOW_ZEN_UPGRADE_NOTIFICATION);
              MOVED_TO_SECURE.add(Global.SHOW_ZEN_SETTINGS_SUGGESTION);
              MOVED_TO_SECURE.add(Global.ZEN_SETTINGS_UPDATED);
              MOVED_TO_SECURE.add(Global.ZEN_SETTINGS_SUGGESTION_VIEWED);
              MOVED_TO_SECURE.add(Global.CHARGING_SOUNDS_ENABLED);
              MOVED_TO_SECURE.add(Global.CHARGING_VIBRATION_ENABLED);
  
          }
  
          /** @hide */
          public static void getMovedToSecureSettings(Set<String> outKeySet) {
              outKeySet.addAll(MOVED_TO_SECURE);
          }
  
          /** @hide */
          public static void clearProviderForTest() {
              sProviderHolder.clearProviderForTest();
              sNameValueCache.clearGenerationTrackerForTest();
          }
  
          /**
           * Look up a name in the database.
           * @param resolver to access the database with
           * @param name to look up in the table
           * @return the corresponding value, or null if not present
           */
          public static String getString(ContentResolver resolver, String name) {
              return getStringForUser(resolver, name, resolver.getUserId());
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static String getStringForUser(ContentResolver resolver, String name,
                  int userHandle) {
              if (MOVED_TO_SECURE.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.Global"
                          + " to android.provider.Settings.Secure, returning read-only value.");
                  return Secure.getStringForUser(resolver, name, userHandle);
              }
              return sNameValueCache.getStringForUser(resolver, name, userHandle);
          }
  
          /**
           * Store a name/value pair into the database.
           * @param resolver to access the database with
           * @param name to store
           * @param value to associate with the name
           * @return true if the value was set, false on database errors
           */
          public static boolean putString(ContentResolver resolver,
                  String name, String value) {
              return putStringForUser(resolver, name, value, null, false, resolver.getUserId());
          }
  
          /**
           * Store a name/value pair into the database.
           * <p>
           * The method takes an optional tag to associate with the setting
           * which can be used to clear only settings made by your package and
           * associated with this tag by passing the tag to {@link
           * #resetToDefaults(ContentResolver, String)}. Anyone can override
           * the current tag. Also if another package changes the setting
           * then the tag will be set to the one specified in the set call
           * which can be null. Also any of the settings setters that do not
           * take a tag as an argument effectively clears the tag.
           * </p><p>
           * For example, if you set settings A and B with tags T1 and T2 and
           * another app changes setting A (potentially to the same value), it
           * can assign to it a tag T3 (note that now the package that changed
           * the setting is not yours). Now if you reset your changes for T1 and
           * T2 only setting B will be reset and A not (as it was changed by
           * another package) but since A did not change you are in the desired
           * initial state. Now if the other app changes the value of A (assuming
           * you registered an observer in the beginning) you would detect that
           * the setting was changed by another app and handle this appropriately
           * (ignore, set back to some value, etc).
           * </p><p>
           * Also the method takes an argument whether to make the value the
           * default for this setting. If the system already specified a default
           * value, then the one passed in here will <strong>not</strong>
           * be set as the default.
           * </p>
           *
           * @param resolver to access the database with.
           * @param name to store.
           * @param value to associate with the name.
           * @param tag to associated with the setting.
           * @param makeDefault whether to make the value the default one.
           * @return true if the value was set, false on database errors.
           *
           * @see #resetToDefaults(ContentResolver, String)
           *
           * @hide
           */
          @SystemApi
          @RequiresPermission(Manifest.permission.WRITE_SECURE_SETTINGS)
          public static boolean putString(@NonNull ContentResolver resolver,
                  @NonNull String name, @Nullable String value, @Nullable String tag,
                  boolean makeDefault) {
              return putStringForUser(resolver, name, value, tag, makeDefault,
                      resolver.getUserId());
          }
  
          /**
           * Reset the settings to their defaults. This would reset <strong>only</strong>
           * settings set by the caller's package. Think of it of a way to undo your own
           * changes to the secure settings. Passing in the optional tag will reset only
           * settings changed by your package and associated with this tag.
           *
           * @param resolver Handle to the content resolver.
           * @param tag Optional tag which should be associated with the settings to reset.
           *
           * @see #putString(ContentResolver, String, String, String, boolean)
           *
           * @hide
           */
          @SystemApi
          @RequiresPermission(Manifest.permission.WRITE_SECURE_SETTINGS)
          public static void resetToDefaults(@NonNull ContentResolver resolver,
                  @Nullable String tag) {
              resetToDefaultsAsUser(resolver, tag, RESET_MODE_PACKAGE_DEFAULTS,
                      resolver.getUserId());
          }
  
          /**
           * Reset the settings to their defaults for a given user with a specific mode. The
           * optional tag argument is valid only for {@link #RESET_MODE_PACKAGE_DEFAULTS}
           * allowing resetting the settings made by a package and associated with the tag.
           *
           * @param resolver Handle to the content resolver.
           * @param tag Optional tag which should be associated with the settings to reset.
           * @param mode The reset mode.
           * @param userHandle The user for which to reset to defaults.
           *
           * @see #RESET_MODE_PACKAGE_DEFAULTS
           * @see #RESET_MODE_UNTRUSTED_DEFAULTS
           * @see #RESET_MODE_UNTRUSTED_CHANGES
           * @see #RESET_MODE_TRUSTED_DEFAULTS
           *
           * @hide
           */
          public static void resetToDefaultsAsUser(@NonNull ContentResolver resolver,
                  @Nullable String tag, @ResetMode int mode, @IntRange(from = 0) int userHandle) {
              try {
                  Bundle arg = new Bundle();
                  arg.putInt(CALL_METHOD_USER_KEY, userHandle);
                  if (tag != null) {
                      arg.putString(CALL_METHOD_TAG_KEY, tag);
                  }
                  arg.putInt(CALL_METHOD_RESET_MODE_KEY, mode);
                  IContentProvider cp = sProviderHolder.getProvider(resolver);
                  cp.call(resolver.getPackageName(), sProviderHolder.mUri.getAuthority(),
                          CALL_METHOD_RESET_GLOBAL, null, arg);
              } catch (RemoteException e) {
                  Log.w(TAG, "Can't reset do defaults for " + CONTENT_URI, e);
              }
          }
  
          /** @hide */
          @UnsupportedAppUsage
          public static boolean putStringForUser(ContentResolver resolver,
                  String name, String value, int userHandle) {
              return putStringForUser(resolver, name, value, null, false, userHandle);
          }
  
          /** @hide */
          public static boolean putStringForUser(@NonNull ContentResolver resolver,
                  @NonNull String name, @Nullable String value, @Nullable String tag,
                  boolean makeDefault, @UserIdInt int userHandle) {
              if (LOCAL_LOGV) {
                  Log.v(TAG, "Global.putString(name=" + name + ", value=" + value
                          + " for " + userHandle);
              }
              // Global and Secure have the same access policy so we can forward writes
              if (MOVED_TO_SECURE.contains(name)) {
                  Log.w(TAG, "Setting " + name + " has moved from android.provider.Settings.Global"
                          + " to android.provider.Settings.Secure, value is unchanged.");
                  return Secure.putStringForUser(resolver, name, value, tag,
                          makeDefault, userHandle);
              }
              return sNameValueCache.putStringForUser(resolver, name, value, tag,
                      makeDefault, userHandle);
          }
  
          /**
           * Construct the content URI for a particular name/value pair,
           * useful for monitoring changes with a ContentObserver.
           * @param name to look up in the table
           * @return the corresponding content URI, or null if not present
           */
          public static Uri getUriFor(String name) {
              return getUriFor(CONTENT_URI, name);
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as an integer.  Note that internally setting values are always
           * stored as strings; this function converts the string to an integer
           * for you.  The default value will be returned if the setting is
           * not defined or not an integer.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid integer.
           */
          public static int getInt(ContentResolver cr, String name, int def) {
              String v = getString(cr, name);
              try {
                  return v != null ? Integer.parseInt(v) : def;
              } catch (NumberFormatException e) {
                  return def;
              }
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as an integer.  Note that internally setting values are always
           * stored as strings; this function converts the string to an integer
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not an integer.
           *
           * @return The setting's current value.
           */
          public static int getInt(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              String v = getString(cr, name);
              try {
                  return Integer.parseInt(v);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a single settings value as an
           * integer. This will either create a new entry in the table if the
           * given name does not exist, or modify the value of the existing row
           * with that name.  Note that internally setting values are always
           * stored as strings, so this function converts the given value to a
           * string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putInt(ContentResolver cr, String name, int value) {
              return putString(cr, name, Integer.toString(value));
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as a {@code long}.  Note that internally setting values are always
           * stored as strings; this function converts the string to a {@code long}
           * for you.  The default value will be returned if the setting is
           * not defined or not a {@code long}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid {@code long}.
           */
          public static long getLong(ContentResolver cr, String name, long def) {
              String valString = getString(cr, name);
              long value;
              try {
                  value = valString != null ? Long.parseLong(valString) : def;
              } catch (NumberFormatException e) {
                  value = def;
              }
              return value;
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as a {@code long}.  Note that internally setting values are always
           * stored as strings; this function converts the string to a {@code long}
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @return The setting's current value.
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not an integer.
           */
          public static long getLong(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              String valString = getString(cr, name);
              try {
                  return Long.parseLong(valString);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a secure settings value as a long
           * integer. This will either create a new entry in the table if the
           * given name does not exist, or modify the value of the existing row
           * with that name.  Note that internally setting values are always
           * stored as strings, so this function converts the given value to a
           * string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putLong(ContentResolver cr, String name, long value) {
              return putString(cr, name, Long.toString(value));
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as a floating point number.  Note that internally setting values are
           * always stored as strings; this function converts the string to an
           * float for you. The default value will be returned if the setting
           * is not defined or not a valid float.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           * @param def Value to return if the setting is not defined.
           *
           * @return The setting's current value, or 'def' if it is not defined
           * or not a valid float.
           */
          public static float getFloat(ContentResolver cr, String name, float def) {
              String v = getString(cr, name);
              try {
                  return v != null ? Float.parseFloat(v) : def;
              } catch (NumberFormatException e) {
                  return def;
              }
          }
  
          /**
           * Convenience function for retrieving a single secure settings value
           * as a float.  Note that internally setting values are always
           * stored as strings; this function converts the string to a float
           * for you.
           * <p>
           * This version does not take a default value.  If the setting has not
           * been set, or the string value is not a number,
           * it throws {@link SettingNotFoundException}.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to retrieve.
           *
           * @throws SettingNotFoundException Thrown if a setting by the given
           * name can't be found or the setting value is not a float.
           *
           * @return The setting's current value.
           */
          public static float getFloat(ContentResolver cr, String name)
                  throws SettingNotFoundException {
              String v = getString(cr, name);
              if (v == null) {
                  throw new SettingNotFoundException(name);
              }
              try {
                  return Float.parseFloat(v);
              } catch (NumberFormatException e) {
                  throw new SettingNotFoundException(name);
              }
          }
  
          /**
           * Convenience function for updating a single settings value as a
           * floating point number. This will either create a new entry in the
           * table if the given name does not exist, or modify the value of the
           * existing row with that name.  Note that internally setting values
           * are always stored as strings, so this function converts the given
           * value to a string before storing it.
           *
           * @param cr The ContentResolver to access.
           * @param name The name of the setting to modify.
           * @param value The new value for the setting.
           * @return true if the value was set, false on database errors
           */
          public static boolean putFloat(ContentResolver cr, String name, float value) {
              return putString(cr, name, Float.toString(value));
          }
  
          /**
            * Subscription to be used for voice call on a multi sim device. The supported values
            * are 0 = SUB1, 1 = SUB2 and etc.
            * @hide
            */
          public static final String MULTI_SIM_VOICE_CALL_SUBSCRIPTION = "multi_sim_voice_call";
  
          /**
            * Used to provide option to user to select subscription during dial.
            * The supported values are 0 = disable or 1 = enable prompt.
            * @hide
            */
          @UnsupportedAppUsage
          public static final String MULTI_SIM_VOICE_PROMPT = "multi_sim_voice_prompt";
  
          /**
            * Subscription to be used for data call on a multi sim device. The supported values
            * are 0 = SUB1, 1 = SUB2 and etc.
            * @hide
            */
          public static final String MULTI_SIM_DATA_CALL_SUBSCRIPTION = "multi_sim_data_call";
  
          /**
            * Subscription to be used for SMS on a multi sim device. The supported values
            * are 0 = SUB1, 1 = SUB2 and etc.
            * @hide
            */
          public static final String MULTI_SIM_SMS_SUBSCRIPTION = "multi_sim_sms";
  
          /**
            * Used to provide option to user to select subscription during send SMS.
            * The value 1 - enable, 0 - disable
            * @hide
            */
          public static final String MULTI_SIM_SMS_PROMPT = "multi_sim_sms_prompt";
  
          /** User preferred subscriptions setting.
            * This holds the details of the user selected subscription from the card and
            * the activation status. Each settings string have the comma separated values
            * iccId,appType,appId,activationStatus,3gppIndex,3gpp2Index
            * @hide
           */
          @UnsupportedAppUsage
          public static final String[] MULTI_SIM_USER_PREFERRED_SUBS = {"user_preferred_sub1",
                  "user_preferred_sub2","user_preferred_sub3"};
  
          /**
           * Which subscription is enabled for a physical slot.
           * @hide
           */
          public static final String ENABLED_SUBSCRIPTION_FOR_SLOT = "enabled_subscription_for_slot";
  
          /**
           * Whether corresponding logical modem is enabled for a physical slot.
           * The value 1 - enable, 0 - disable
           * @hide
           */
          public static final String MODEM_STACK_ENABLED_FOR_SLOT = "modem_stack_enabled_for_slot";
  
          /**
           * Whether to enable new contacts aggregator or not.
           * The value 1 - enable, 0 - disable
           * @hide
           */
          public static final String NEW_CONTACT_AGGREGATOR = "new_contact_aggregator";
  
          /**
           * Whether to enable contacts metadata syncing or not
           * The value 1 - enable, 0 - disable
           *
           * @removed
           */
          @Deprecated
          public static final String CONTACT_METADATA_SYNC = "contact_metadata_sync";
  
          /**
           * Whether to enable contacts metadata syncing or not
           * The value 1 - enable, 0 - disable
           */
          public static final String CONTACT_METADATA_SYNC_ENABLED = "contact_metadata_sync_enabled";
  
          /**
           * Whether to enable cellular on boot.
           * The value 1 - enable, 0 - disable
           * @hide
           */
          public static final String ENABLE_CELLULAR_ON_BOOT = "enable_cellular_on_boot";
  
          /**
           * The maximum allowed notification enqueue rate in Hertz.
           *
           * Should be a float, and includes updates only.
           * @hide
           */
          public static final String MAX_NOTIFICATION_ENQUEUE_RATE = "max_notification_enqueue_rate";
  
          /**
           * Displays toasts when an app posts a notification that does not specify a valid channel.
           *
           * The value 1 - enable, 0 - disable
           * @hide
           */
          public static final String SHOW_NOTIFICATION_CHANNEL_WARNINGS =
                  "show_notification_channel_warnings";
  
          /**
           * Whether cell is enabled/disabled
           * @hide
           */
          public static final String CELL_ON = "cell_on";
  
          /**
           * Global settings which can be accessed by instant apps.
           * @hide
           */
          public static final Set<String> INSTANT_APP_SETTINGS = new ArraySet<>();
          static {
              INSTANT_APP_SETTINGS.add(WAIT_FOR_DEBUGGER);
              INSTANT_APP_SETTINGS.add(DEVICE_PROVISIONED);
              INSTANT_APP_SETTINGS.add(DEVELOPMENT_FORCE_RESIZABLE_ACTIVITIES);
              INSTANT_APP_SETTINGS.add(DEVELOPMENT_FORCE_RTL);
              INSTANT_APP_SETTINGS.add(EPHEMERAL_COOKIE_MAX_SIZE_BYTES);
              INSTANT_APP_SETTINGS.add(AIRPLANE_MODE_ON);
              INSTANT_APP_SETTINGS.add(WINDOW_ANIMATION_SCALE);
              INSTANT_APP_SETTINGS.add(TRANSITION_ANIMATION_SCALE);
              INSTANT_APP_SETTINGS.add(ANIMATOR_DURATION_SCALE);
              INSTANT_APP_SETTINGS.add(DEBUG_VIEW_ATTRIBUTES);
              INSTANT_APP_SETTINGS.add(DEBUG_VIEW_ATTRIBUTES_APPLICATION_PACKAGE);
              INSTANT_APP_SETTINGS.add(WTF_IS_FATAL);
              INSTANT_APP_SETTINGS.add(SEND_ACTION_APP_ERROR);
              INSTANT_APP_SETTINGS.add(ZEN_MODE);
          }
  
          /**
           * Whether to show the high temperature warning notification.
           * @hide
           */
          public static final String SHOW_TEMPERATURE_WARNING = "show_temperature_warning";
  
          /**
           * Whether to show the usb high temperature alarm notification.
           * @hide
           */
          public static final String SHOW_USB_TEMPERATURE_ALARM = "show_usb_temperature_alarm";
  
          /**
           * Temperature at which the high temperature warning notification should be shown.
           * @hide
           */
          public static final String WARNING_TEMPERATURE = "warning_temperature";
  
          /**
           * Whether the diskstats logging task is enabled/disabled.
           * @hide
           */
          public static final String ENABLE_DISKSTATS_LOGGING = "enable_diskstats_logging";
  
          /**
           * Whether the cache quota calculation task is enabled/disabled.
           * @hide
           */
          public static final String ENABLE_CACHE_QUOTA_CALCULATION =
                  "enable_cache_quota_calculation";
  
          /**
           * Whether the Deletion Helper no threshold toggle is available.
           * @hide
           */
          public static final String ENABLE_DELETION_HELPER_NO_THRESHOLD_TOGGLE =
                  "enable_deletion_helper_no_threshold_toggle";
  
          /**
           * The list of snooze options for notifications
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "default=60,options_array=15:30:60:120"
           *
           * The following keys are supported:
           *
           * <pre>
           * default               (int)
           * options_array         (int[])
           * </pre>
           *
           * All delays in integer minutes. Array order is respected.
           * Options will be used in order up to the maximum allowed by the UI.
           * @hide
           */
          public static final String NOTIFICATION_SNOOZE_OPTIONS =
                  "notification_snooze_options";
  
          /**
           * Settings key for the ratio of notification dismissals to notification views - one of the
           * criteria for showing the notification blocking helper.
           *
           * <p>The value is a float ranging from 0.0 to 1.0 (the closer to 0.0, the more intrusive
           * the blocking helper will be).
           *
           * @hide
           */
          public static final String BLOCKING_HELPER_DISMISS_TO_VIEW_RATIO_LIMIT =
                  "blocking_helper_dismiss_to_view_ratio";
  
          /**
           * Settings key for the longest streak of dismissals  - one of the criteria for showing the
           * notification blocking helper.
           *
           * <p>The value is an integer greater than 0.
           *
           * @hide
           */
          public static final String BLOCKING_HELPER_STREAK_LIMIT = "blocking_helper_streak_limit";
  
          /**
           * Configuration flags for SQLite Compatibility WAL. Encoded as a key-value list, separated
           * by commas. E.g.: compatibility_wal_supported=true, wal_syncmode=OFF
           *
           * Supported keys:<br/>
           * <li>
           * <ul> {@code legacy_compatibility_wal_enabled} : A {code boolean} flag that determines
           * whether or not "compatibility WAL" mode is enabled by default. This is a legacy flag
           * and is honoured on Android Q and higher. This flag will be removed in a future release.
           * </ul>
           * <ul> {@code wal_syncmode} : A {@code String} representing the synchronization mode to use
           * when WAL is enabled, either via {@code legacy_compatibility_wal_enabled} or using the
           * obsolete {@code compatibility_wal_supported} flag.
           * </ul>
           * <ul> {@code truncate_size} : A {@code int} flag that specifies the truncate size of the
           * WAL journal.
           * </ul>
           * <ul> {@code compatibility_wal_supported} : A {code boolean} flag that specifies whether
           * the legacy "compatibility WAL" mode is enabled by default. This flag is obsolete and is
           * only supported on Android Pie.
           * </ul>
           * </li>
           *
           * @hide
           */
          public static final String SQLITE_COMPATIBILITY_WAL_FLAGS =
                  "sqlite_compatibility_wal_flags";
  
          /**
           * Enable GNSS Raw Measurements Full Tracking?
           * 0 = no
           * 1 = yes
           * @hide
           */
          public static final String ENABLE_GNSS_RAW_MEAS_FULL_TRACKING =
                  "enable_gnss_raw_meas_full_tracking";
  
          /**
           * Whether the notification should be ongoing (persistent) when a carrier app install is
           * required.
           *
           * The value is a boolean (1 or 0).
           * @hide
           */
          @SystemApi
          public static final String INSTALL_CARRIER_APP_NOTIFICATION_PERSISTENT =
                  "install_carrier_app_notification_persistent";
  
          /**
           * The amount of time (ms) to hide the install carrier app notification after the user has
           * ignored it. After this time passes, the notification will be shown again
           *
           * The value is a long
           * @hide
           */
          @SystemApi
          public static final String INSTALL_CARRIER_APP_NOTIFICATION_SLEEP_MILLIS =
                  "install_carrier_app_notification_sleep_millis";
  
          /**
           * Whether we've enabled zram on this device. Takes effect on
           * reboot. The value "1" enables zram; "0" disables it, and
           * everything else is unspecified.
           * @hide
           */
          public static final String ZRAM_ENABLED =
                  "zram_enabled";
  
          /**
           * Configuration flags for smart replies in notifications.
           * This is encoded as a key=value list, separated by commas. Ex:
           *
           * "enabled=1,max_squeeze_remeasure_count=3"
           *
           * The following keys are supported:
           *
           * <pre>
           * enabled                           (boolean)
           * requires_targeting_p              (boolean)
           * max_squeeze_remeasure_attempts    (int)
           * edit_choices_before_sending       (boolean)
           * show_in_heads_up                  (boolean)
           * min_num_system_generated_replies  (int)
           * max_num_actions                   (int)
           * </pre>
           * @see com.android.systemui.statusbar.policy.SmartReplyConstants
           * @hide
           */
          public static final String SMART_REPLIES_IN_NOTIFICATIONS_FLAGS =
                  "smart_replies_in_notifications_flags";
  
          /**
           * Configuration flags for the automatic generation of smart replies and smart actions in
           * notifications. This is encoded as a key=value list, separated by commas. Ex:
           * "generate_replies=false,generate_actions=true".
           *
           * The following keys are supported:
           *
           * <pre>
           * generate_replies                 (boolean)
           * generate_actions                 (boolean)
           * </pre>
           * @hide
           */
          public static final String SMART_SUGGESTIONS_IN_NOTIFICATIONS_FLAGS =
                  "smart_suggestions_in_notifications_flags";
  
          /**
           * If nonzero, crashes in foreground processes will bring up a dialog.
           * Otherwise, the process will be silently killed.
           * @hide
           */
          public static final String SHOW_FIRST_CRASH_DIALOG = "show_first_crash_dialog";
  
          /**
           * If nonzero, crash dialogs will show an option to restart the app.
           * @hide
           */
          public static final String SHOW_RESTART_IN_CRASH_DIALOG = "show_restart_in_crash_dialog";
  
          /**
           * If nonzero, crash dialogs will show an option to mute all future crash dialogs for
           * this app.
           * @hide
           */
          public static final String SHOW_MUTE_IN_CRASH_DIALOG = "show_mute_in_crash_dialog";
  
  
          /**
           * If nonzero, will show the zen upgrade notification when the user toggles DND on/off.
           * @hide
           * @deprecated - Use {@link android.provider.Settings.Secure#SHOW_ZEN_UPGRADE_NOTIFICATION}
           */
          @Deprecated
          public static final String SHOW_ZEN_UPGRADE_NOTIFICATION = "show_zen_upgrade_notification";
  
          /**
           * If nonzero, will show the zen update settings suggestion.
           * @hide
           * @deprecated - Use {@link android.provider.Settings.Secure#SHOW_ZEN_SETTINGS_SUGGESTION}
           */
          @Deprecated
          public static final String SHOW_ZEN_SETTINGS_SUGGESTION = "show_zen_settings_suggestion";
  
          /**
           * If nonzero, zen has not been updated to reflect new changes.
           * @deprecated - Use {@link android.provider.Settings.Secure#ZEN_SETTINGS_UPDATED}
           * @hide
           */
          @Deprecated
          public static final String ZEN_SETTINGS_UPDATED = "zen_settings_updated";
  
          /**
           * If nonzero, zen setting suggestion has been viewed by user
           * @hide
           * @deprecated - Use {@link android.provider.Settings.Secure#ZEN_SETTINGS_SUGGESTION_VIEWED}
           */
          @Deprecated
          public static final String ZEN_SETTINGS_SUGGESTION_VIEWED =
                  "zen_settings_suggestion_viewed";
  
          /**
           * Backup and restore agent timeout parameters.
           * These parameters are represented by a comma-delimited key-value list.
           *
           * The following strings are supported as keys:
           * <pre>
           *     kv_backup_agent_timeout_millis         (long)
           *     full_backup_agent_timeout_millis       (long)
           *     shared_backup_agent_timeout_millis     (long)
           *     restore_agent_timeout_millis           (long)
           *     restore_agent_finished_timeout_millis  (long)
           * </pre>
           *
           * They map to milliseconds represented as longs.
           *
           * Ex: "kv_backup_agent_timeout_millis=30000,full_backup_agent_timeout_millis=300000"
           *
           * @hide
           */
          public static final String BACKUP_AGENT_TIMEOUT_PARAMETERS =
                  "backup_agent_timeout_parameters";
  
          /**
           * Whether the backup system service supports multiple users (0 = disabled, 1 = enabled). If
           * disabled, the service will only be active for the system user.
           *
           * @hide
           */
          public static final String BACKUP_MULTI_USER_ENABLED = "backup_multi_user_enabled";
  
          /**
           * Blacklist of GNSS satellites.
           *
           * This is a list of integers separated by commas to represent pairs of (constellation,
           * svid). Thus, the number of integers should be even.
           *
           * E.g.: "3,0,5,24" denotes (constellation=3, svid=0) and (constellation=5, svid=24) are
           * blacklisted. Note that svid=0 denotes all svids in the
           * constellation are blacklisted.
           *
           * @hide
           */
          public static final String GNSS_SATELLITE_BLACKLIST = "gnss_satellite_blacklist";
  
          /**
           * Duration of updates in millisecond for GNSS location request from HAL to framework.
           *
           * If zero, the GNSS location request feature is disabled.
           *
           * The value is a non-negative long.
           *
           * @hide
           */
          public static final String GNSS_HAL_LOCATION_REQUEST_DURATION_MILLIS =
                  "gnss_hal_location_request_duration_millis";
  
          /**
           * Binder call stats settings.
           *
           * The following strings are supported as keys:
           * <pre>
           *     enabled              (boolean)
           *     detailed_tracking    (boolean)
           *     upload_data          (boolean)
           *     sampling_interval    (int)
           * </pre>
           *
           * @hide
           */
          public static final String BINDER_CALLS_STATS = "binder_calls_stats";
  
          /**
           * Looper stats settings.
           *
           * The following strings are supported as keys:
           * <pre>
           *     enabled              (boolean)
           *     sampling_interval    (int)
           * </pre>
           *
           * @hide
           */
          public static final String LOOPER_STATS = "looper_stats";
  
          /**
           * Settings for collecting statistics on CPU usage per thread
           *
           * The following strings are supported as keys:
           * <pre>
           *     num_buckets          (int)
           *     collected_uids       (string)
           *     minimum_total_cpu_usage_millis (int)
           * </pre>
           *
           * @hide
           */
          public static final String KERNEL_CPU_THREAD_READER = "kernel_cpu_thread_reader";
  
          /**
           * Default user id to boot into. They map to user ids, for example, 10, 11, 12.
           *
           * @hide
           */
          public static final String DEFAULT_USER_ID_TO_BOOT_INTO = "default_boot_into_user_id";
  
          /**
           * Persistent user id that is last logged in to.
           *
           * They map to user ids, for example, 10, 11, 12.
           *
           * @hide
           */
          public static final String LAST_ACTIVE_USER_ID = "last_active_persistent_user_id";
  
          /**
           * Whether we've enabled native flags health check on this device. Takes effect on
           * reboot. The value "1" enables native flags health check; otherwise it's disabled.
           * @hide
           */
          public static final String NATIVE_FLAGS_HEALTH_CHECK_ENABLED =
                  "native_flags_health_check_enabled";
  
          /**
           * Parameter for {@link #APPOP_HISTORY_PARAMETERS} that controls the mode
           * in which the historical registry operates.
           *
           * @hide
           */
          public static final String APPOP_HISTORY_MODE = "mode";
  
          /**
           * Parameter for {@link #APPOP_HISTORY_PARAMETERS} that controls how long
           * is the interval between snapshots in the base case i.e. the most recent
           * part of the history.
           *
           * @hide
           */
          public static final String APPOP_HISTORY_BASE_INTERVAL_MILLIS = "baseIntervalMillis";
  
          /**
           * Parameter for {@link #APPOP_HISTORY_PARAMETERS} that controls the base
           * for the logarithmic step when building app op history.
           *
           * @hide
           */
          public static final String APPOP_HISTORY_INTERVAL_MULTIPLIER = "intervalMultiplier";
  
          /**
           * Appop history parameters. These parameters are represented by
           * a comma-delimited key-value list.
           *
           * The following strings are supported as keys:
           * <pre>
           *     mode                  (int)
           *     baseIntervalMillis    (long)
           *     intervalMultiplier    (int)
           * </pre>
           *
           * Ex: "mode=HISTORICAL_MODE_ENABLED_ACTIVE,baseIntervalMillis=1000,intervalMultiplier=10"
           *
           * @see #APPOP_HISTORY_MODE
           * @see #APPOP_HISTORY_BASE_INTERVAL_MILLIS
           * @see #APPOP_HISTORY_INTERVAL_MULTIPLIER
           *
           * @hide
           */
          public static final String APPOP_HISTORY_PARAMETERS =
                  "appop_history_parameters";
  
          /**
           * Delay for sending ACTION_CHARGING after device is plugged in.
           * This is used as an override for constants defined in BatteryStatsImpl for
           * ease of experimentation.
           *
           * @see com.android.internal.os.BatteryStatsImpl.Constants.KEY_BATTERY_CHARGED_DELAY_MS
           * @hide
           */
          public static final String BATTERY_CHARGING_STATE_UPDATE_DELAY =
                  "battery_charging_state_update_delay";
  
          /**
           * A serialized string of params that will be loaded into a text classifier action model.
           *
           * @hide
           */
          public static final String TEXT_CLASSIFIER_ACTION_MODEL_PARAMS =
                  "text_classifier_action_model_params";
  
          /**
           * The amount of time to suppress "power-off" from the power button after the device has
           * woken due to a gesture (lifting the phone).  Since users have learned to hit the power
           * button immediately when lifting their device, it can cause the device to turn off if a
           * gesture has just woken the device. This value tells us the milliseconds to wait after
           * a gesture before "power-off" via power-button is functional again. A value of 0 is no
           * delay, and reverts to the old behavior.
           *
           * @hide
           */
          public static final String POWER_BUTTON_SUPPRESSION_DELAY_AFTER_GESTURE_WAKE =
                  "power_button_suppression_delay_after_gesture_wake";
      }
  
      /**
       * Configuration system settings, containing settings which are applied identically for all
       * defined users. Only Android can read these and only a specific configuration service can
       * write these.
       *
       * @hide
       */
      public static final class Config extends NameValueTable {
          private static final ContentProviderHolder sProviderHolder =
                  new ContentProviderHolder(DeviceConfig.CONTENT_URI);
  
          // Populated lazily, guarded by class object:
          private static final NameValueCache sNameValueCache = new NameValueCache(
                  DeviceConfig.CONTENT_URI,
                  CALL_METHOD_GET_CONFIG,
                  CALL_METHOD_PUT_CONFIG,
                  sProviderHolder);
  
          /**
           * Look up a name in the database.
           * @param resolver to access the database with
           * @param name to look up in the table
           * @return the corresponding value, or null if not present
           *
           * @hide
           */
          @RequiresPermission(Manifest.permission.READ_DEVICE_CONFIG)
          static String getString(ContentResolver resolver, String name) {
              return sNameValueCache.getStringForUser(resolver, name, resolver.getUserId());
          }
  
          /**
           * Store a name/value pair into the database.
           * <p>
           * Also the method takes an argument whether to make the value the default for this setting.
           * If the system already specified a default value, then the one passed in here will
           * <strong>not</strong> be set as the default.
           * </p>
           *
           * @param resolver to access the database with.
           * @param name to store.
           * @param value to associate with the name.
           * @param makeDefault whether to make the value the default one.
           * @return true if the value was set, false on database errors.
           *
           * @see #resetToDefaults(ContentResolver, int, String)
           *
           * @hide
           */
          @RequiresPermission(Manifest.permission.WRITE_DEVICE_CONFIG)
          static boolean putString(@NonNull ContentResolver resolver, @NonNull String name,
                  @Nullable String value, boolean makeDefault) {
              return sNameValueCache.putStringForUser(resolver, name, value, null, makeDefault,
                      resolver.getUserId());
          }
  
          /**
           * Reset the values to their defaults.
           * <p>
           * The method accepts an optional prefix parameter. If provided, only pairs with a name that
           * starts with the exact prefix will be reset. Otherwise all will be reset.
           *
           * @param resolver Handle to the content resolver.
           * @param resetMode The reset mode to use.
           * @param prefix Optionally, to limit which which pairs are reset.
           *
           * @see #putString(ContentResolver, String, String, boolean)
           *
           * @hide
           */
          @RequiresPermission(Manifest.permission.WRITE_DEVICE_CONFIG)
          static void resetToDefaults(@NonNull ContentResolver resolver, @ResetMode int resetMode,
                  @Nullable String prefix) {
              try {
                  Bundle arg = new Bundle();
                  arg.putInt(CALL_METHOD_USER_KEY, resolver.getUserId());
                  arg.putInt(CALL_METHOD_RESET_MODE_KEY, resetMode);
                  if (prefix != null) {
                      arg.putString(Settings.CALL_METHOD_PREFIX_KEY, prefix);
                  }
                  IContentProvider cp = sProviderHolder.getProvider(resolver);
                  cp.call(resolver.getPackageName(), sProviderHolder.mUri.getAuthority(),
                          CALL_METHOD_RESET_CONFIG, null, arg);
              } catch (RemoteException e) {
                  Log.w(TAG, "Can't reset to defaults for " + DeviceConfig.CONTENT_URI, e);
              }
          }
      }
  
      /**
       * User-defined bookmarks and shortcuts.  The target of each bookmark is an
       * Intent URL, allowing it to be either a web page or a particular
       * application activity.
       *
       * @hide
       */
      public static final class Bookmarks implements BaseColumns
      {
          private static final String TAG = "Bookmarks";
  
          /**
           * The content:// style URL for this table
           */
          @UnsupportedAppUsage
          public static final Uri CONTENT_URI =
              Uri.parse("content://" + AUTHORITY + "/bookmarks");
  
          /**
           * The row ID.
           * <p>Type: INTEGER</p>
           */
          public static final String ID = "_id";
  
          /**
           * Descriptive name of the bookmark that can be displayed to the user.
           * If this is empty, the title should be resolved at display time (use
           * {@link #getTitle(Context, Cursor)} any time you want to display the
           * title of a bookmark.)
           * <P>
           * Type: TEXT
           * </P>
           */
          public static final String TITLE = "title";
  
          /**
           * Arbitrary string (displayed to the user) that allows bookmarks to be
           * organized into categories.  There are some special names for
           * standard folders, which all start with '@'.  The label displayed for
           * the folder changes with the locale (via {@link #getLabelForFolder}) but
           * the folder name does not change so you can consistently query for
           * the folder regardless of the current locale.
           *
           * <P>Type: TEXT</P>
           *
           */
          public static final String FOLDER = "folder";
  
          /**
           * The Intent URL of the bookmark, describing what it points to.  This
           * value is given to {@link android.content.Intent#getIntent} to create
           * an Intent that can be launched.
           * <P>Type: TEXT</P>
           */
          public static final String INTENT = "intent";
  
          /**
           * Optional shortcut character associated with this bookmark.
           * <P>Type: INTEGER</P>
           */
          public static final String SHORTCUT = "shortcut";
  
          /**
           * The order in which the bookmark should be displayed
           * <P>Type: INTEGER</P>
           */
          public static final String ORDERING = "ordering";
  
          private static final String[] sIntentProjection = { INTENT };
          private static final String[] sShortcutProjection = { ID, SHORTCUT };
          private static final String sShortcutSelection = SHORTCUT + "=?";
  
          /**
           * Convenience function to retrieve the bookmarked Intent for a
           * particular shortcut key.
           *
           * @param cr The ContentResolver to query.
           * @param shortcut The shortcut key.
           *
           * @return Intent The bookmarked URL, or null if there is no bookmark
           *         matching the given shortcut.
           */
          public static Intent getIntentForShortcut(ContentResolver cr, char shortcut)
          {
              Intent intent = null;
  
              Cursor c = cr.query(CONTENT_URI,
                      sIntentProjection, sShortcutSelection,
                      new String[] { String.valueOf((int) shortcut) }, ORDERING);
              // Keep trying until we find a valid shortcut
              try {
                  while (intent == null && c.moveToNext()) {
                      try {
                          String intentURI = c.getString(c.getColumnIndexOrThrow(INTENT));
                          intent = Intent.parseUri(intentURI, 0);
                      } catch (java.net.URISyntaxException e) {
                          // The stored URL is bad...  ignore it.
                      } catch (IllegalArgumentException e) {
                          // Column not found
                          Log.w(TAG, "Intent column not found", e);
                      }
                  }
              } finally {
                  if (c != null) c.close();
              }
  
              return intent;
          }
  
          /**
           * Add a new bookmark to the system.
           *
           * @param cr The ContentResolver to query.
           * @param intent The desired target of the bookmark.
           * @param title Bookmark title that is shown to the user; null if none
           *            or it should be resolved to the intent's title.
           * @param folder Folder in which to place the bookmark; null if none.
           * @param shortcut Shortcut that will invoke the bookmark; 0 if none. If
           *            this is non-zero and there is an existing bookmark entry
           *            with this same shortcut, then that existing shortcut is
           *            cleared (the bookmark is not removed).
           * @return The unique content URL for the new bookmark entry.
           */
          @UnsupportedAppUsage
          public static Uri add(ContentResolver cr,
                                             Intent intent,
                                             String title,
                                             String folder,
                                             char shortcut,
                                             int ordering)
          {
              // If a shortcut is supplied, and it is already defined for
              // another bookmark, then remove the old definition.
              if (shortcut != 0) {
                  cr.delete(CONTENT_URI, sShortcutSelection,
                          new String[] { String.valueOf((int) shortcut) });
              }
  
              ContentValues values = new ContentValues();
              if (title != null) values.put(TITLE, title);
              if (folder != null) values.put(FOLDER, folder);
              values.put(INTENT, intent.toUri(0));
              if (shortcut != 0) values.put(SHORTCUT, (int) shortcut);
              values.put(ORDERING, ordering);
              return cr.insert(CONTENT_URI, values);
          }
  
          /**
           * Return the folder name as it should be displayed to the user.  This
           * takes care of localizing special folders.
           *
           * @param r Resources object for current locale; only need access to
           *          system resources.
           * @param folder The value found in the {@link #FOLDER} column.
           *
           * @return CharSequence The label for this folder that should be shown
           *         to the user.
           */
          public static CharSequence getLabelForFolder(Resources r, String folder) {
              return folder;
          }
  
          /**
           * Return the title as it should be displayed to the user. This takes
           * care of localizing bookmarks that point to activities.
           *
           * @param context A context.
           * @param cursor A cursor pointing to the row whose title should be
           *        returned. The cursor must contain at least the {@link #TITLE}
           *        and {@link #INTENT} columns.
           * @return A title that is localized and can be displayed to the user,
           *         or the empty string if one could not be found.
           */
          public static CharSequence getTitle(Context context, Cursor cursor) {
              int titleColumn = cursor.getColumnIndex(TITLE);
              int intentColumn = cursor.getColumnIndex(INTENT);
              if (titleColumn == -1 || intentColumn == -1) {
                  throw new IllegalArgumentException(
                          "The cursor must contain the TITLE and INTENT columns.");
              }
  
              String title = cursor.getString(titleColumn);
              if (!TextUtils.isEmpty(title)) {
                  return title;
              }
  
              String intentUri = cursor.getString(intentColumn);
              if (TextUtils.isEmpty(intentUri)) {
                  return "";
              }
  
              Intent intent;
              try {
                  intent = Intent.parseUri(intentUri, 0);
              } catch (URISyntaxException e) {
                  return "";
              }
  
              PackageManager packageManager = context.getPackageManager();
              ResolveInfo info = packageManager.resolveActivity(intent, 0);
              return info != null ? info.loadLabel(packageManager) : "";
          }
      }
  
      /**
       * <p>
       *     A Settings panel is floating UI that contains a fixed subset of settings to address a
       *     particular user problem. For example, the
       *     {@link #ACTION_INTERNET_CONNECTIVITY Internet Panel} surfaces settings related to
       *     connecting to the internet.
       * <p>
       *     Settings panels appear above the calling app to address the problem without
       *     the user needing to open Settings and thus leave their current screen.
       */
      public static final class Panel {
          private Panel() {
          }
  
          /**
           * Activity Action: Show a settings dialog containing settings to enable internet
           * connection.
           * <p>
           * Input: Nothing.
           * <p>
           * Output: Nothing.
           */
          @SdkConstant(SdkConstant.SdkConstantType.ACTIVITY_INTENT_ACTION)
          public static final String ACTION_INTERNET_CONNECTIVITY =
                  "android.settings.panel.action.INTERNET_CONNECTIVITY";
  
          /**
           * Activity Action: Show a settings dialog containing NFC-related settings.
           * <p>
           * Input: Nothing.
           * <p>
           * Output: Nothing.
           */
          @SdkConstant(SdkConstant.SdkConstantType.ACTIVITY_INTENT_ACTION)
          public static final String ACTION_NFC =
                  "android.settings.panel.action.NFC";
  
          /**
           * Activity Action: Show a settings dialog containing controls for Wifi.
           * <p>
           * Input: Nothing.
           * <p>
           * Output: Nothing.
           */
          @SdkConstant(SdkConstant.SdkConstantType.ACTIVITY_INTENT_ACTION)
          public static final String ACTION_WIFI =
                  "android.settings.panel.action.WIFI";
  
          /**
           * Activity Action: Show a settings dialog containing all volume streams.
           * <p>
           * Input: Nothing.
           * <p>
           * Output: Nothing.
           */
          @SdkConstant(SdkConstant.SdkConstantType.ACTIVITY_INTENT_ACTION)
          public static final String ACTION_VOLUME =
                  "android.settings.panel.action.VOLUME";
      }
  
      private static final String[] PM_WRITE_SETTINGS = {
          android.Manifest.permission.WRITE_SETTINGS
      };
      private static final String[] PM_CHANGE_NETWORK_STATE = {
          android.Manifest.permission.CHANGE_NETWORK_STATE,
          android.Manifest.permission.WRITE_SETTINGS
      };
      private static final String[] PM_SYSTEM_ALERT_WINDOW = {
          android.Manifest.permission.SYSTEM_ALERT_WINDOW
      };
  
      /**
       * Performs a strict and comprehensive check of whether a calling package is allowed to
       * write/modify system settings, as the condition differs for pre-M, M+, and
       * privileged/preinstalled apps. If the provided uid does not match the
       * callingPackage, a negative result will be returned.
       * @hide
       */
      @UnsupportedAppUsage
      public static boolean isCallingPackageAllowedToWriteSettings(Context context, int uid,
              String callingPackage, boolean throwException) {
          return isCallingPackageAllowedToPerformAppOpsProtectedOperation(context, uid,
                  callingPackage, throwException, AppOpsManager.OP_WRITE_SETTINGS,
                  PM_WRITE_SETTINGS, false);
      }
  
      /**
       * Performs a strict and comprehensive check of whether a calling package is allowed to
       * write/modify system settings, as the condition differs for pre-M, M+, and
       * privileged/preinstalled apps. If the provided uid does not match the
       * callingPackage, a negative result will be returned. The caller is expected to have
       * the WRITE_SETTINGS permission declared.
       *
       * Note: if the check is successful, the operation of this app will be updated to the
       * current time.
       * @hide
       */
      public static boolean checkAndNoteWriteSettingsOperation(Context context, int uid,
              String callingPackage, boolean throwException) {
          return isCallingPackageAllowedToPerformAppOpsProtectedOperation(context, uid,
                  callingPackage, throwException, AppOpsManager.OP_WRITE_SETTINGS,
                  PM_WRITE_SETTINGS, true);
      }
  
      /**
       * Performs a strict and comprehensive check of whether a calling package is allowed to
       * change the state of network, as the condition differs for pre-M, M+, and
       * privileged/preinstalled apps. The caller is expected to have either the
       * CHANGE_NETWORK_STATE or the WRITE_SETTINGS permission declared. Either of these
       * permissions allow changing network state; WRITE_SETTINGS is a runtime permission and
       * can be revoked, but (except in M, excluding M MRs), CHANGE_NETWORK_STATE is a normal
       * permission and cannot be revoked. See http://b/23597341
       *
       * Note: if the check succeeds because the application holds WRITE_SETTINGS, the operation
       * of this app will be updated to the current time.
       * @hide
       */
      public static boolean checkAndNoteChangeNetworkStateOperation(Context context, int uid,
              String callingPackage, boolean throwException) {
          if (context.checkCallingOrSelfPermission(android.Manifest.permission.CHANGE_NETWORK_STATE)
                  == PackageManager.PERMISSION_GRANTED) {
              return true;
          }
          return isCallingPackageAllowedToPerformAppOpsProtectedOperation(context, uid,
                  callingPackage, throwException, AppOpsManager.OP_WRITE_SETTINGS,
                  PM_CHANGE_NETWORK_STATE, true);
      }
  
      /**
       * Performs a strict and comprehensive check of whether a calling package is allowed to
       * draw on top of other apps, as the conditions differs for pre-M, M+, and
       * privileged/preinstalled apps. If the provided uid does not match the callingPackage,
       * a negative result will be returned.
       * @hide
       */
      @UnsupportedAppUsage
      public static boolean isCallingPackageAllowedToDrawOverlays(Context context, int uid,
              String callingPackage, boolean throwException) {
          return isCallingPackageAllowedToPerformAppOpsProtectedOperation(context, uid,
                  callingPackage, throwException, AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
                  PM_SYSTEM_ALERT_WINDOW, false);
      }
  
      /**
       * Performs a strict and comprehensive check of whether a calling package is allowed to
       * draw on top of other apps, as the conditions differs for pre-M, M+, and
       * privileged/preinstalled apps. If the provided uid does not match the callingPackage,
       * a negative result will be returned.
       *
       * Note: if the check is successful, the operation of this app will be updated to the
       * current time.
       * @hide
       */
      public static boolean checkAndNoteDrawOverlaysOperation(Context context, int uid, String
              callingPackage, boolean throwException) {
          return isCallingPackageAllowedToPerformAppOpsProtectedOperation(context, uid,
                  callingPackage, throwException, AppOpsManager.OP_SYSTEM_ALERT_WINDOW,
                  PM_SYSTEM_ALERT_WINDOW, true);
      }
  
      /**
       * Helper method to perform a general and comprehensive check of whether an operation that is
       * protected by appops can be performed by a caller or not. e.g. OP_SYSTEM_ALERT_WINDOW and
       * OP_WRITE_SETTINGS
       * @hide
       */
      @UnsupportedAppUsage
      public static boolean isCallingPackageAllowedToPerformAppOpsProtectedOperation(Context context,
              int uid, String callingPackage, boolean throwException, int appOpsOpCode, String[]
              permissions, boolean makeNote) {
          if (callingPackage == null) {
              return false;
          }
  
          AppOpsManager appOpsMgr = (AppOpsManager)context.getSystemService(Context.APP_OPS_SERVICE);
          int mode = AppOpsManager.MODE_DEFAULT;
          if (makeNote) {
              mode = appOpsMgr.noteOpNoThrow(appOpsOpCode, uid, callingPackage);
          } else {
              mode = appOpsMgr.checkOpNoThrow(appOpsOpCode, uid, callingPackage);
          }
  
          switch (mode) {
              case AppOpsManager.MODE_ALLOWED:
                  return true;
  
              case AppOpsManager.MODE_DEFAULT:
                  // this is the default operating mode after an app's installation
                  // In this case we will check all associated static permission to see
                  // if it is granted during install time.
                  for (String permission : permissions) {
                      if (context.checkCallingOrSelfPermission(permission) == PackageManager
                              .PERMISSION_GRANTED) {
                          // if either of the permissions are granted, we will allow it
                          return true;
                      }
                  }
  
              default:
                  // this is for all other cases trickled down here...
                  if (!throwException) {
                      return false;
                  }
          }
  
          // prepare string to throw SecurityException
          StringBuilder exceptionMessage = new StringBuilder();
          exceptionMessage.append(callingPackage);
          exceptionMessage.append(" was not granted ");
          if (permissions.length > 1) {
              exceptionMessage.append(" either of these permissions: ");
          } else {
              exceptionMessage.append(" this permission: ");
          }
          for (int i = 0; i < permissions.length; i++) {
              exceptionMessage.append(permissions[i]);
              exceptionMessage.append((i == permissions.length - 1) ? "." : ", ");
          }
  
          throw new SecurityException(exceptionMessage.toString());
      }
  
      /**
       * Retrieves a correponding package name for a given uid. It will query all
       * packages that are associated with the given uid, but it will return only
       * the zeroth result.
       * Note: If package could not be found, a null is returned.
       * @hide
       */
      public static String getPackageNameForUid(Context context, int uid) {
          String[] packages = context.getPackageManager().getPackagesForUid(uid);
          if (packages == null) {
              return null;
          }
          return packages[0];
      }
  }
  