Migrate Android sources to MIT license header

Reviewed By: fkgozali

Differential Revision: D8065619

fbshipit-source-id: 719c303b40c96950bab8e5dde9a75f449b2956c6

ReactAndroid/src/main/java/com/facebook/react/uimanager/BaseViewManager.java

@@ -1,4 +1,7 @@
-// Copyright 2004-present Facebook. All Rights Reserved.
+// Copyright (c) 2004-present, Facebook, Inc.
+
+// This source code is licensed under the MIT license found in the
+// LICENSE file in the root directory of this source tree.
 
 package com.facebook.react.uimanager;