Bluetooth in band ring

Prevent the telecom service from generating a ringer if there is already
a ringer generated by a phone connected over bluetooth headset client
service.

Bug: 65673832
Test: runtest bluetooth -c
com.android.bluetooth.hfpclient.HeadsetClientStateMachineTest

Change-Id: Ie4011598c2719897afb6185f928951289ab9c731
(cherry picked from commit 396dd51efd7e51b0f61647172b76f1cc4e9c85f7)