Merge "Log battery saver disabled event and reason (1/2)" into udc-dev am:...

Merge "Log battery saver disabled event and reason (1/2)" into udc-dev am: 23b3a96f am: 7238c404 am: e131e630

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22747327



Change-Id: I5e83f0762a67cda0a59e1314a95db4e27be13579
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>