1. Disable dialog when the sys language doesn't change
2. Associate region with system locale
Bug: 402600866
Test: atest LocaleListEditTest
Flag: EXEMPT bugfix
Change-Id: I2c7ddbf89b6caa02a35e247ebe97086f5880adee
User wants to add the same language (non system language) with a different region. Adding the same language again with a different region will change the region of that language to the new region.
Bug: 388942734
Test: manual verification
Flag: EXEMPT bugfix
Change-Id: Ib124aa795277d5e1d66f3a98a16ab9bf1cfbe08f
1. show dialog
2. change the region of the top locale
Bug: 385047778
Flag: com.android.settings.flags.regional_preferences_api_enabled
Test: check hsv, atest
Change-Id: I9746cdec670899b3768dcd1e0aa59e1959dd7e06
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
