Merge "block call forwarding MMI codes from apps" into udc-dev am: 9393d8c424

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/22792583

Change-Id: Ibc1435aae203cbe0e231921a3a2e8408f664e803
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>