renderer: Use NextAVTransport* values in GetMediaInfo()
renderer: Use NextAVTransport* values in GetMediaInfo()

AVTransport should return NextAVtransportURI and
NextAVtransportURIMetadata variables in GetMediaInfo() and
GetMEdiaInfo_Ext() now that they are available.

https://bugzilla.gnome.org/show_bug.cgi?id=727424

Tarnyko/rygel,GNOME/rygel,Pelagicore/Media-Manager-Rygel-patched,Pelagicore/Media-Manager-Rygel-patched,GNOME/rygel,GNOME/rygel,Tarnyko/rygel,Pelagicore/Media-Manager-Rygel-patched