MIME type or uri scheme handler in question.
Range of MimeAppsListFile objects to use in searching.
Range of MimeInfoCacheFile objects to use in searching.
desktop file provider instance. Must be non-null.
Found DesktopFile or null if not found. Note: In real world you probably will need to call this function on parent MIME type if it fails for original mimeType.
Find default application for mimeType.