Merge "floss: Update volume callback's signature" am: bf446d50 am: 51e6fe47

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2128852



Change-Id: I27ff44663e3289528784e187b3a1990bcb787f98
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>