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 am: fd3608be

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

Change-Id: I630daba4cc320505b47dac0109d59038100e63a2