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

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



Change-Id: I69ef07c12ecb49d0a019be19a7c91989e2ea1856
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>