[automerger skipped] Ensure service unbind when receiving a null call...

[automerger skipped] Ensure service unbind when receiving a null call screening service in onBind. am: 14927c6f am: a005a852 am: 3d3098da am: 4451efa5 am: 12809100 am: 4854fd48 am: 186e7f63 am: 2b64ad7e am: 9d5e96af -s ours

am skip reason: Merged-In Ia5b62bb93dc666b6b8b8daccb8ef41eb55dde7ea with SHA-1 14927c6f is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/21224930



Change-Id: Iab28da3eb5e8b0af6cdcc6ef186a00158b7eebe1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>