Merge "Bluetooth: fix NullPointerException during bluetooth turning off" into main am: e20017d53b am: 8a5ff60eb7 am: 5cbd060ffe

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

Change-Id: I0411ec9813ccf4c3cc856074d2b34f0256fbf822
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>