Add missing license headers.

Bug: N/A
Test: N/A
Change-Id: Idd0bbd1bcdcec2facfffe66a31db7f817ee99d0e
diff --git a/AccessControl.h b/AccessControl.h
index 63a2098..82dccb6 100644
--- a/AccessControl.h
+++ b/AccessControl.h
@@ -1,3 +1,19 @@
+/*
+ * 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.
+ */
+
 #include <string>
 
 #include <selinux/android.h>