Merge "Messaging doesn\'t allow sharing of its own files" into nyc-dev am: ca5fc9fa7d
am: 65e8a2d330

* commit '65e8a2d33005760f03bb0ca2c412332ab82f7413':
  Messaging doesn't allow sharing of its own files

Change-Id: I5b3a6ffadacd8da1c8db1a626f78ca2bc65a2f7e