Merge "Unregister GATT clients when disconnected" into main am: ee727806

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3369884



Change-Id: Ia3a66091c617802c65c4625cce89b87053393a8f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>