Remove vibrate-on-silent-mode per UX

Also show current ringtone (6265196)

Cherry-picked from
https://googleplex-android-review.googlesource.com/#/c/253780/
https://googleplex-android-review.googlesource.com/#/c/253801/

Bug: 7631982
Bug: 6265196
Change-Id: I7a9212d8672a225ab95c0fa2973ae616b393f005