[automerger skipped] Make mServiceListener as null before calling...

[automerger skipped] Make mServiceListener as null before calling onServiceDisconnected am: 3b8dbf1d -s ours

am skip reason: Merged-In I7342befd9a8fc69c778d20140558afb148a4232e with SHA-1 e07b56b4 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/20204855



Change-Id: Iec90f0f1a8607b172f485acfae63412984ae72bd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>