Merge "Add callback for connections to be notified when the ringer is silenced." into cw-e-dev am: 52bdf11583 am: b241487c16 am: 64e41590d2
am: 0ca7de9031

* commit '0ca7de90310034d118f21343a69a38ebc02dd0bc':
  Add callback for connections to be notified when the ringer is silenced.