Merge "Revert "Ringer mode button state a11y"" into udc-dev am: c6a789e7 am: dc22dfe7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23589201



Change-Id: I56204fd0085815ee93c53e9c3e11710193173c00
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>