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 am: 44b6e646 am: 59924eb8

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



Change-Id: I410693cd94830bd7b56a42f29ff6d7e0aeb2adf1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>