Merge "export broadcast receiver in BlockedNumberActivity" into udc-dev am: 9260abca

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/22300219



Change-Id: I9bbbca5ba7ad5364e6ebd741af92400e58950eeb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>