### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
- [X] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success.

### Electron Version

13.1.7

### What operating system are you using?

Windows

### Operating System Version

Windows 10 version 20H2

### What arch are you using?

x64

### Last Known Working Electron version

12.0.15

### Expected Behavior

Checking `navigator.userAgentData` in Chrome 91 returns an array of brands appropriately. Electron 13/14 do not return anything.

This appears to then become a problem for my situation. I am posting a form with hidden variables to a third-party vendor I work with. This form post ultimately loads an iframe.

Expected: As it does in Chrome 91, load the iframe from this third-party vendor.

### Actual Behavior

A header of "sec-ch-ua" is included in the request to the third-party vendor and it is blank. They are rejecting the post because of an invalid header. I suspect this is because Chrome 13/14 does not make this hint data made available correctly.

I tried loading various sites in Chrome 91 that do load brand names in Electron 13/14 and they are empty if you review `navigator.userAgentData`.

### Testcase Gist URL

_No response_

### Additional Information

_No response_
shell/browser/electron_browser_context.cc
#include "chrome/common/pref_names.h"
#include "components/keyed_service/content/browser_context_dependency_manager.h"
#include "components/prefs/json_pref_store.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/pref_service_factory.h"
#include "components/prefs/value_map_pref_store.h"
#include "components/proxy_config/pref_proxy_config_tracker_impl.h"
#include "components/proxy_config/proxy_config_pref_names.h"
#include "content/browser/blob_storage/chrome_blob_storage_context.h"  
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/cors_origin_pattern_setter.h"
#include "content/public/browser/shared_cors_origin_access_list.h"
#include "content/public/browser/storage_partition.h"
#include "services/network/public/cpp/features.h"
#include "services/network/public/cpp/wrapper_shared_url_loader_factory.h"
#include "services/network/public/mojom/network_context.mojom.h"
#include "shell/browser/cookie_change_notifier.h"
#include "shell/browser/electron_browser_client.h"
#include "shell/browser/electron_browser_main_parts.h"
#include "shell/browser/electron_download_manager_delegate.h"
#include "shell/browser/electron_permission_manager.h"
#include "shell/browser/net/resolve_proxy_helper.h"
#include "shell/browser/pref_store_delegate.h"
#include "shell/browser/protocol_registry.h"
#include "shell/browser/special_storage_policy.h"
#include "shell/browser/ui/inspectable_web_contents.h"
#include "shell/browser/web_view_manager.h"
#include "shell/browser/zoom_level_delegate.h"
#include "shell/common/application_info.h"