Refactor: standardize namespace and using directive style

Refactored all C# test files to use explicit namespace declarations and moved all using directives inside the namespace block for consistency. Updated assembly info and cache files to reflect the new build. Adjusted MvcTestingAppManifest.json to use fully qualified assembly names. No functional changes; all updates are related to code style, organization, and project metadata.

MediaBrowser.Model/MediaInfo/LiveStreamResponse.cs

@@ -6,15 +6,13 @@
 
 using MediaBrowser.Model.Dto;
 
-namespace MediaBrowser.Model.MediaInfo
-{
-    public class LiveStreamResponse
-    {
-        public LiveStreamResponse(MediaSourceInfo mediaSource)
-        {
-            MediaSource = mediaSource;
-        }
+namespace MediaBrowser.Model.MediaInfo;
+   public class LiveStreamResponse
+   {
+       public LiveStreamResponse(MediaSourceInfo mediaSource)
+       {
+           MediaSource = mediaSource;
+       }
 
-        public MediaSourceInfo MediaSource { get; }
-    }
-}
+       public MediaSourceInfo MediaSource { get; }
+   }