Update LICENSE on headers/proto files to APACHE2

Change-Id: I44af7a4d9ccab7e50f130eccb662f56f3cafdaf6
diff --git a/nugget/include/app_nugget.h b/nugget/include/app_nugget.h
index 67fc726..9e13463 100644
--- a/nugget/include/app_nugget.h
+++ b/nugget/include/app_nugget.h
@@ -1,6 +1,17 @@
-/* Copyright 2017 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
  */
 #ifndef __CROS_EC_INCLUDE_APP_NUGGET_H
 #define __CROS_EC_INCLUDE_APP_NUGGET_H