Add ChangeEvent() in FMOD Studio Event Emitter

Viagg-io/Assets/Plugins/FMOD/src/StudioEventEmitter.cs

@@ -405,5 +405,12 @@ namespace FMODUnity
             }
             return false;
         }
+
+        public void ChangeEvent(EventReference eventRef)
+        {
+            Stop();
+            EventReference = eventRef;
+            Lookup();
+        }
     }
 }