files-view: Use tracked directories for star

We were using the xdg directories to check whether we can star a file or not, since the star feature only works on directories that are tracked by tracker.

Tracker is usually shipped in distributions tracking the xdg-directories, so we check that as a stop gap solution for 3.30 since we didn't have time to actually query what directories tracker is tracking and match that.

This work makes it so that we show the star action on tracked directories.

A new dependency is added to Flatpak, tracker-miners, since it's required for the Tracker schema.