Telecom:fix NPE problem to avoid telecom process crash. am: baccd54a am: 97480564

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telecomm/+/3095059



Change-Id: I630a909af9b19bf4f09c0db88a6e26b1b1ab3311
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>