Merge "Camera / UidObserver: Add the ability to subscribe to specific UIDs" into udc-dev am: 9560a12c95

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22829996

Change-Id: I479e410807c410617b167077a702766b03a5fa6c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>