Handle null bindings returned from ConnectionService. am: 410ce02600 am: 86f45ae8c0 am: df451bd586 am: f5efe09836 am: d1aeb51529 am: 06f19a83a2 am: 17aaebbacb

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

Change-Id: Ia89bf5bacc154d8efa3a3daa17ffdf8b77a92b4c