update channels

MediaBrowser.Controller/Channels/ISearchableChannel.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Controller.Channels
+{
+    public interface ISearchableChannel
+    {
+        /// <summary>
+        /// Searches the specified search term.
+        /// </summary>
+        /// <param name="searchInfo">The search information.</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task{IEnumerable{ChannelItemInfo}}.</returns>
+        Task<IEnumerable<ChannelItemInfo>> Search(ChannelSearchInfo searchInfo, CancellationToken cancellationToken);
+    }
+}