Remove device from background list when initiating disconnect am: 44f711fa...

Remove device from background list when initiating disconnect am: 44f711fa am: fcd3742d am: c61a5fc2

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2117841



Change-Id: I7ff8b25a2637a17fbff38472af293fa27fff09c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>