Fix notification delegate not being wired up

must have disappeared in a refactor

Author: NattyNarwhal

Submariner/SBPlayer.swift

@@ -36,6 +36,8 @@ extension NSNotification.Name {
     private override init() {
         super.init()
 
+        initNotifications()
+        
         initializeMediaControls()
 
         // This is counter-intuitive, but this has to be *off* for AirPlay from the app to work