The previous method "compareTo" isn't locale-sensitive, it cannot sort the String in some other languages. So Collator is recommended to be applyed here. Bug: Sort doesn't work in some languages. Test: make RunSettingsRoboTests -j40 ROBOTEST_FILTER=ZonePickerComparatorTest Change-Id: Id107ab938cceefc77f9fb6918a0445fc92a0fcb7 Signed-off-by: tiansiming <tiansiming@xiaomi.com>