Merge "floss: Update volume callback's signature" am: bf446d50 am: 51e6fe47 am: 40b0386c

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



Change-Id: I31e6aca77c7b470378702ae8631c62a122202e92
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>