Add license to libhidl and libhidl-test.

Test: mma
Change-Id: Idf745ae53f45a40229578ab543714929915fff72
diff --git a/test/main.cpp b/test/main.cpp
index c2dd773..648f0c7 100644
--- a/test/main.cpp
+++ b/test/main.cpp
@@ -1,3 +1,19 @@
+/*
+ * 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.
+ */
+
 #define LOG_TAG "LibHidlTest"
 
 #include <android-base/logging.h>