Merge "Don't update volume if volume level is same as current device volume."...

Merge "Don't update volume if volume level is same as current device volume." am: cc6d5581 am: a9f332b0 am: 232504b9

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Bluetooth/+/1168010

Change-Id: I3879dc96167bfececb508767dfe87d9201d0e2ac