update_payload: migrate the license headers to AOSP

update_engine/scripts/* have CROS license but the rest of UE have android
license. This cl just migrates all CROS licenses to AOSP.

BUG=None
TEST=repo upload did not complain about the mismatched licenses.

Change-Id: Id947be3e860baf7a523163965336f47d268c6808
Reviewed-on: https://chromium-review.googlesource.com/891688
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
diff --git a/scripts/update_payload/checker.py b/scripts/update_payload/checker.py
index 8e04f1e..db17011 100644
--- a/scripts/update_payload/checker.py
+++ b/scripts/update_payload/checker.py
@@ -1,6 +1,18 @@
-# Copyright (c) 2013 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) 2013 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.
+#
 
 """Verifying the integrity of a Chrome OS update payload.