renderer: Initialize mute state from player
renderer: Initialize mute state from player

https://bugzilla.gnome.org/show_bug.cgi?id=677552

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