Fix ConnectionServiceFocusManager NPE am: 021a0ee8ff am: 16e65883f0 am: df26b7f841 am: 75a005b186

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telecomm/+/2747814

Change-Id: I847b63204a4a25291000e426839668e5706c4fe2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>