Fix copyright headers

Went missing in a bunch of places.

Change-Id: I911fc89c893c015c9fc444c15a9ec6e30400538b

tools/gen_binary_descriptors

diff --git a/tools/gen_binary_descriptors b/tools/gen_binary_descriptors
index 8bba861..e980379 100755
--- a/tools/gen_binary_descriptors
+++ b/tools/gen_binary_descriptors
@@ -100,7 +100,22 @@
     include_guard = target.replace('/', '_').replace('.', '_').upper() + '_'
 
     with open(os.path.join(ROOT_DIR, target), 'wb') as f:
-      f.write("""
+      f.write("""/*
+ * Copyright (C) 2019 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 {include_guard}
 #define {include_guard}