1. Use flag to control the UI migration
2. Create language_and_region_settings.xml for new UI migration.
Bug: 379962955
Flag: com.android.settings.flags.regional_preferences_api_enabled
Test: check hsv and atest LanguagePreferenceControllerTest
Change-Id: If8d2303a2a3061231e69d1a45ad432c061da3545
Use the centralized registry to look up category key instead.
Bug: 32936784
Test: make RunSettingsRoboTests -j40
Change-Id: I0b8c72d70f93e4b5c58871ac90de41f69ad15653
- Removed LanguageAndInputDashboardAlias because now the contents are
moved to new pages.
Bug: 32637613
Bug: 32643833
Test: RunSettingsRoboTests
Change-Id: Ia66a942a449a07b9cbba53bdc97738148aafadb4