fix(AudioSwitcher): Add missing return type

Author: Belphemur

SoundSwitch.Audio.Manager/AudioSwitcher.cs

@@ -190,7 +190,7 @@ public string GetUsedDevice(EDataFlow flow, ERole role, uint processId)
         /// <param name="device"></param>
         /// <param name="interaction"></param>
         /// <typeparam name="T"></typeparam>
-        public void InteractWithMmDevice<T>(MMDevice device, Func<MMDevice, T> interaction) => ComThread.Invoke(() => interaction(device));
+        public T InteractWithMmDevice<T>(MMDevice device, Func<MMDevice, T> interaction) => ComThread.Invoke(() => interaction(device));
 
         /// <summary>
         /// Get the current default endpoint