change logic for determining emergency number am: 65e5f676 am: fd4d41e2

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



Change-Id: I5eb0d365b080691289fc52d1716d835a43c6b40d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>