Merge "UidObserver / Camera: Track the OOM adj of a uid via UidObserver." into udc-dev am: 34ee2b8e60 am: f9feca9e4f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22366514

Change-Id: I148b2cb8ba3b181bbed17e3429480fdbad6e3d42
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>