Add not exported flag to affected runtime receiver am: bf923878 am: 4f569245 am: b96e5585

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telecomm/+/2270166



Change-Id: Ibd2181e9d6916ec0d589c05cf43ac915b64a2686
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>