change logic for determining emergency number am: 65e5f676 am: eedec7dc am: bc46b01a

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



Change-Id: If8159ac10c4654de2c8f183f252b217907c0b34e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>