refactor: rearrange and add solution for 4-series

src/PepperDash.Essentials.Devices.Common/Codec/iHasCallFavorites.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+
+namespace PepperDash.Essentials.Devices.Common.Codec
+{
+    public interface IHasCallFavorites
+    {
+        CodecCallFavorites CallFavorites { get; }
+    }
+
+    /// <summary>
+    /// Represents favorites entries for a codec device
+    /// </summary>
+    public class CodecCallFavorites
+    {
+        public List<CodecActiveCallItem> Favorites { get; set; }
+
+        public CodecCallFavorites()
+        {
+            Favorites = new List<CodecActiveCallItem>();
+        }
+    }
+}