Merge "Ringer mode button state a11y" into udc-dev am: d1e6064e am: f901a4aa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23535497



Change-Id: I9ce116d1044427880e12fb71d75065b80b69d6f5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>