Merge "block call forwarding MMI codes from apps" into udc-dev am: 9393d8c4 am: cfdd7ea0

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



Change-Id: I618fff0e0ef59e0cdf29d0ca6641feae1e2a7782
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>