Merge "block call forwarding MMI codes from apps" into udc-dev am: 9393d8c4 am: 3171e5f5 am: 483f8728

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



Change-Id: I0ad609e484e20b86ab931a6134761f1e70b995f9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>