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: 99943f26

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



Change-Id: Id2e08104010974d5e8a53a5e2e713a4d6ecdb56e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>