Fixes the fade setting to properly set its summary when not disabled.
Flag: EXEMPT internal change
Bug: 349178637
Test: Check the settings page with navigation button mode and FAB button mode. Verify the summary of the fade setting is correct in both cases.
Change-Id: Ia87a634fd69e6098f1a0a658f788e69d10f2dbec
Configures page to hide/replace elements that would mention gesture.
Also, provides context when necessary if a setting is disabled by the current button mode.
Demonstration video:
https://x20web.corp.google.com/users/jo/jonesriley/splitShortcut/a11yShortcutSettingsCleanup.mp4
Test: manual, navigate to the Accessibility Button "more options" page in gesture navigation mode. Verify there are no references to gesture.
Bug: 349178639
Flag: android.provider.a11y_standalone_gesture_enabled
Change-Id: I067738d23e74c00bab4010d187820d09013809ad
SwitchPreference and SwitchPreferenceCompat are both TwoStatePreference.
Using TwoStatePreference in Java will helps migration in the future.
Bug: 306771414
Test: manual - check Settings pages
Change-Id: I84e1d7b09451106797c2b23d127855c6976678ca
* Opacity preference will be disabled when fade is disabled
Bug: 173940869
Test: atest AccessibilityButtonFadePreferenceControllerTest AccessibilityButtonOactiyPreferenceControllerTest
Change-Id: I1efd9760aa0287899cddd10ddd9a88a81ccc39ba
