change logic for determining emergency number am: 65e5f676 am: a0756efe

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/18284852



Change-Id: If46ba444d9fc0cf3e6a10466eda2f53b97de4a8a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>