Handle null bindings returned from ConnectionService. am: 410ce02600 am: 86f45ae8c0 am: df451bd586 am: f5efe09836

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

Change-Id: I3e2e8a3b76bad009ea407bc6d63369937f006b08