Merge "Bluetooth: fix NullPointerException during bluetooth turning off" into main am: e20017d53b am: 8a5ff60eb7

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2707194

Change-Id: I916e1bcae3ff5391d55246088e536e5e8bbcfd38
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>