Merge "Bluetooth airplane listener: Check for null" am: 2b7a7f8ec9 am: 38a83f01dc am: e2654876bf

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1522300

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4a788dbd9c3f57b44261a4fa3b1d575166d0274f