Merge "Avoiding sending set volume to volume level same as current volume...

Merge "Avoiding sending set volume to volume level same as current volume level" am: 51d9d220 am: 042bed28 am: 6947d142

Original change: https://android-review.googlesource.com/c/platform/system/bt/+/1824720

Change-Id: I20270bf3f3d0108f4e58a56a60d0c260a137ef77