[automerger skipped] RESTRICT AUTOMERGE Fix exported broadcast receiver vulnerability am: 923ef07e61 -s ours am: 00f9ebe5da

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/CellBroadcastReceiver/+/12912964

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I49874a25e4c5985b2d275366b529ec271910ff31