Send broadcast when a system app updates for the first time after device setup...

Send broadcast when a system app updates for the first time after device setup in LocaleManagerService

Adds a tracker for tracking the system app updates. If the system app is
being updated for the first time, it fetches the per-app locales and
sends a broadcast to the installer.

Bug: 220076498
Bug: 220830700

Test: atest FrameworksServicesTests:SystemAppUpdateTrackerTest

Change-Id: Id307c8b59b48119619b86b92c7a0fc453402f2e3