mtp: Refresh storage information in query_info
mtp: Refresh storage information in query_info

Get the storage information from the device in query_info() and
query_fs_info() so that the disk space numbers are correct. Previously,
if you deleted an item and checked the free space, it would not have
changed.

https://bugzilla.gnome.org/show_bug.cgi?id=749491

gicmo/gvfs,gicmo/gvfs,gicmo/gvfs,gicmo/gvfs