Update UiTests/Common/TestConstants.cs

Co-authored-by: kellyyangsong <[email protected]>

Author: JoshLozensky

UiTests/Common/TestConstants.cs

@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
 using System;
 using System.Collections.Generic;
 using System.Linq;