Merge "Use "useEmergencyPdn" flag for emergency SMS" into udc-dev am: a664df66 am: 5045cea8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/21806847



Change-Id: I49d2dbc93cf1de22ee04dae83f3713236433de3d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>