Merge "Broadcast subId upon service initialized" into udc-dev am: 267e9454 am: 76404c45

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/telephony/+/22339247



Change-Id: I8e4c856444815dd5baff3879b1d592994a7a0e25
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>