Adding RECEIVER_EXPORTED flag.

ACTION_CLOSE_SySTEM_DIALOG has been deprecated and will be dropped by the system in non-debug builds S+, so we want to preserve the old behavior and should mark this receiver as exported for T+.

Bug:161145287
Change-Id: I27fa0cbd971d17cb2bf7852e464c1b37d41350a8
Test: no-op
1 file changed