Handle null bindings returned from ConnectionService. am: 410ce02600 am: 86f45ae8c0 am: df451bd586

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

Change-Id: Ie4b377d3a7d119852e1361cb8ac6bd09ef2c2971