Merge "Feature flag for stylus battery notifications." into tm-qpr-dev am:...

Merge "Feature flag for stylus battery notifications." into tm-qpr-dev am: 83af9f92 am: 20de40f7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20541586



Change-Id: I7d270d70b88219772ab44547f7f91e3e92ce4ac3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>