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 am: ab5000a6

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



Change-Id: Ia120b89ab536a9afed20e38ed38e4702112be53a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>