Merge "Add metrics for low battery warning" into tm-dev am: 5dc38453 am:...

Merge "Add metrics for low battery warning" into tm-dev am: 5dc38453 am: a337e341 am: 8c07a393

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17635305



Change-Id: Ia87a51318e3bf0e89fe7e5a3955baf1741cf23e9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>