gdbus: Init more types to work around gtype thread issue
gdbus: Init more types to work around gtype thread issue

See https://bugzilla.gnome.org/show_bug.cgi?id=674885#c85

In this pass I also went through and added more types from GDBusConnection.

johne53/MB3Glib,endlessm/glib,endlessm/glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,endlessm/glib,endlessm/glib,johne53/MB3Glib