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: c4620960

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



Change-Id: I38325bfa8e3f2e369160ea549972e9cb41bf1061
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>