Create signature permission BROADCAST_CLOSE_SYSTEM_DIALOGS

And give it to the platform in preparation for locking down
Intent.ACTION_CLOSE_SYSTEM_DIALOGS that's being abused by malware.

Test: atest CtsPermission2TestCases
Bug: 159105552
Change-Id: I97d04818409750e8bb36ca2a078dc7f8e3a1475b
2 files changed