Secure a handful of framework broadcasts

At least one of these was getting spoofed in the wild.
We don't want to go too far this late in the game, but this is a good start.

bug:7622253
(cherry picked from commit 47918ae3b4e7ebb54711884e9ff9d0300591ab8b)

Conflicts:

	core/res/AndroidManifest.xml

Change-Id: I08affd0fa9855061052a27371cfb48bdee7864a6