Merge "BluetoothInCallService: remove IN_CALL_SERVICE_RINGING" am: 16b5c1372b

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Bluetooth/+/1566738

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I1262da54fc6630a42656d55318e437ee9992a45a