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

Merge "Only allow root/system UIDs to send broadcast to unexported receiver" into tm-dev am: ca324fca

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17307852



Change-Id: I6cdb8b7d9383d7930172422b1a69d14928627c4d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>