- (LocalePickerWithRegion) Only list the language that supported by app
- Add "System language" option
- Add current app locale into suggestion list
- Sort locales by these priorities:
1. Current app's locale
2. System language
3. Suggested language
4. Supported languages
Bug: 223090003
Test: Manual
- (system languages page)
Check Settings-> System -> Languages -> Languages
- (pre-apps language page)
Check Settings-> System -> Languages -> Apps Languages
- Add unit test in follow CL(tracing in b/224747202)
Change-Id: I8dc9f73811dbf653b32773fb98ddb2e4656a4432
780ff7127a