We should be warning if a controlled component becomes uncontrolled, or vice versa.

I thought this was fixed in https://github.com/facebook/react/issues/5821, but apparently it was either not fixed for checkbox components, or maybe I subsequently broke it in https://github.com/facebook/react/pull/7003 (or similar).  Regardless, we should fix it.

Demo of case that should warn: https://jsfiddle.net/s4742gkk/

jest.resetModuleRegistry();
    EventConstants = require('EventConstants');
    React = require('React');
    ReactDOM = require('ReactDOM');
    ReactDOMServer = require('ReactDOMServer');
    ReactDOMFeatureFlags = require('ReactDOMFeatureFlags');
    ReactLink = require('ReactLink');
    ReactTestUtils = require('ReactTestUtils');
    inputValueTracking = require('inputValueTracking');
    spyOn(console, 'error');
  });
  it('should display `defaultValue` of number 0', function() {
    var stub = <input type="text" defaultValue={0} />;
    stub = ReactTestUtils.renderIntoDocument(stub);
    var node = ReactDOM.findDOMNode(stub);
    expect(node.getAttribute('value')).toBe('0');
    expect(node.value).toBe('0');
  });
  it('should display "true" for `defaultValue` of `true`', function() {
    var stub = <input type="text" defaultValue={true} />;
    stub = ReactTestUtils.renderIntoDocument(stub);
    var node = ReactDOM.findDOMNode(stub);
    expect(node.value).toBe('true');
  });
  it('should display "false" for `defaultValue` of `false`', function() {
    var stub = <input type="text" defaultValue={false} />;
    stub = ReactTestUtils.renderIntoDocument(stub);
    var node = ReactDOM.findDOMNode(stub);
    expect(node.value).toBe('false');
  });