Adding receiver flag.

ACTION_CLOSE_SYSTEM_DIALOG should always be marked as exported since it is used in tests, but dropped by the platform in versions that will require a flag marking a context registered receiver as exported/not exported.

Change-Id: I0f943ed36aa763d294b80e25af8e3d05d56b8f5f
Test: No-op
Bug: 208294772
1 file changed