Merge "Add manual enabled battery saver reason (1/4)" into udc-dev am: 047b5680 am: dc1468da

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22525825



Change-Id: Ia4d4bd7557d6e1ff07d95dfc8e2ef1fd8eac617c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>