Control interfaces exposed to the browser from the media service.

media/mojo/services/media_manifest.json

 {
   "manifest_version":  1,
   "name": "mojo:media",
   "process-group": "browser",
   "display_name": "Media Service",
   "capabilities": {
-    "provided": {
-      "all_interfaces": [ "*" ]
-    },
     "required": {
       "*": { "classes": [ "app" ] }
     }
   }
 }