Root cause: Portrait mode does not always respect the sw600dp qualifier and instead uses the phone (default) resources.
Solution: Using the product to customize the tablet and phone cases is better way than using the configuration qualifier.
Bug: 269130587
Test: Manual testing
Change-Id: I90cc44f1e9bccf8950a4d89f70119ba5e3c0bfdc
1. Add gesture preference controller for gesture navigation
2. Auto update the preview illustarion when screen reader is on
3. Auto update accessibility button title for system navigation
Bug: 190563948
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityButtonGesturePreferenceControllerTest ROBOTEST_FILTER=AccessibilityButtonPreviewPreferenceControllerTest ROBOTEST_FILTER=AccessibilityLayerDrawableTest ROBOTEST_FILTER=AccessibilityPreferenceControllerTest ROBOTEST_FILTER=AccessibilityButtonFooterPreferenceControllerTest
Change-Id: Ifa98fc029430d86d3143133b3203b239340f2e41
