Added AOSP license headers.

This is only for hals which are currently only in master. Separate
commit for hals currently in AOSP.

Test: pass
Change-Id: I0b1a09798c49f4f0141f36a322c4749e47eded03
diff --git a/light/2.0/default/Light.h b/light/2.0/default/Light.h
index 83458d8..8987036 100644
--- a/light/2.0/default/Light.h
+++ b/light/2.0/default/Light.h
@@ -1,3 +1,18 @@
+/*
+ * Copyright (C) 2016 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 ANDROID_HARDWARE_LIGHT_V2_0_LIGHT_H
 #define ANDROID_HARDWARE_LIGHT_V2_0_LIGHT_H