Merge "Revert "Revert "Only allow root/system UIDs to send broadcast to...

Merge "Revert "Revert "Only allow root/system UIDs to send broadcast to unexported receiver""" into tm-dev am: 49aa5e4a am: 51163700

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17647158



Change-Id: I58c38c7085ab29b2a9020be62bcc86c4f1280ab6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>