Merge "Ringer mode button state a11y" into udc-dev am: d1e6064e am: d48cff57

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



Change-Id: I1f2c090d60147a6196873bd1aa0567dcb3f77278
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>