Add missing using after automerge

Author: h3xds1nz

src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Media/Imaging/CachedBitmap.cs

@@ -1,9 +1,9 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
 
-using MS.Internal;
+using System.Runtime.InteropServices;
 using MS.Win32.PresentationCore;
+using MS.Internal;
 
 namespace System.Windows.Media.Imaging
 {