Merge "BT: fix NPE issue in bt stack." am: 46cc1a14 am: 2bbbbd0d am: 33eb566d

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2219525



Change-Id: If2d8446a62647b6714f8201f83f77a9bb03f7f43
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>