Merge "Strings for USI low battery notifications." into tm-qpr-dev am: dc8aebcd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20813114



Change-Id: Iac1e7708be8373d0df0c6316c73a87b5753011dc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>