Merge "block call forwarding MMI codes from apps" into udc-dev am: 9393d8c4 am: 0bf47915

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



Change-Id: I78f930db4f08b27f0b5dbe1704714dfcfeb93ed8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>