Merge "Add test coverage for EmergencyCallHelper." into udc-dev am: 3d4c6eebfd am: f6e43809c6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/23143003

Change-Id: Id51724dffd76cb5554a15334c11a28a97734e15d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>