Fix issue "open battery settings, switch locale, apps are still in old locale" into pi-dev

Clear uid to package detail cache by checking locale before use.

Fixes: 62422871
Test: RunSettingsRoboTest pass,
manual test
(1) open advance battery settings page,
(2) switch locale,
(3) back to advance battery settings page  => pass
manual test
(1) open advance battery settings page, and then back to settings main page
(2) switch locale,
(3) go to advance battery settings page  => pass

Change-Id: Ifac830706539022cd9bf51d3f33e728aadc163f4