Handle null bindings returned from ConnectionService. am: 410ce026 am:...

Handle null bindings returned from ConnectionService. am: 410ce026 am: 86f45ae8 am: df451bd5 am: f5efe098 am: d1aeb515 am: 06f19a83 am: 17aaebba am: f5921785

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/17104573

Change-Id: I4d632411f4d5a3917939987f65aed449e099878c