Fix volume setting; move view model to common

RedBookPlayer.Common/Hardware/Player.cs

@@ -389,6 +389,12 @@ namespace RedBookPlayer.Common.Hardware
         /// <param name="load">True to enable loading data tracks, false otherwise</param>
         public void SetLoadDataTracks(bool load) => (_opticalDisc as CompactDisc)?.SetLoadDataTracks(load);
 
+        /// <summary>
+        /// Set the value for the volume
+        /// </summary>
+        /// <param name="volume">New volume value</param>
+        public void SetVolume(int volume) => _soundOutput?.SetVolume(volume);
+
         /// <summary>
         /// Update the player from the current OpticalDisc
         /// </summary>