Tidy up license headers [3/n]

Summary: Changelog: [General] [Fixed] - License header cleanup

Reviewed By: yungsters

Differential Revision: D17952693

fbshipit-source-id: 8fcb8e58a2e04e7a3169f4d525bffc00835768e6

packages/react-native-codegen/buck_tests/java/FloatPropsNativeComponentViewManager.java

@@ -1,3 +1,10 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * 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;
 
 import android.view.ViewGroup;