1. Link ACTION_MEASUREMENT_SYSTEM_SETTINGS to MeasurementSystemItemFragment
2. Link ACTION_NUMBERING_SYSTEM_SETTINGS to NumberingPreferencesFragment
3. Link ACTION_REGION_SETTINGS to RegionPickerFragment
4. Deprecate NumberingPreferencesFragment
Bug: 381038747
Flag: android.provider.system_regional_preferences_api_enabled
Test: use test app to try intent ACTION, atest
Change-Id: Id76e589ce25ae5dfc3443948300c6c21ab30672c
1. Add the new entry point
2. Use flag to control the migration
Bug: 379962955
Flag: com.android.settings.flags.regional_preferences_api_enabled
Test: check hsv and atest TermsOfAddressCategoryControllerTest
Change-Id: Ie78a0f16188f3c4414dcd653189e5772f99ecb4d
1. The region which is selected in region picker will also apply to the first locale.
2. When a user change the first locale, the region of the first locale will be updated to the region picker.
Bug: 385047778
Flag: com.android.settings.flags.regional_preferences_api_enabled
Test: check hsv
Change-Id: I001e0910ce9d1601513ed2f52e6ee30d3551859f
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
