broadcast radio: add wrapper over HAL implementation

Add radio HAL wrapper in radio service to prepare migration to HIDL.

Bug: 31973526
Change-Id: I93fc6f00a2211f7ca425be73090f12b2855c9641
diff --git a/services/radio/TunerCallbackInterface.h b/services/radio/TunerCallbackInterface.h
new file mode 100644
index 0000000..4973cce
--- /dev/null
+++ b/services/radio/TunerCallbackInterface.h
@@ -0,0 +1,38 @@
+/*
+ * 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_TUNER_CALLBACK_INTERFACE_H
+#define ANDROID_HARDWARE_TUNER_CALLBACK_INTERFACE_H
+
+#include <utils/RefBase.h>
+#include <system/radio.h>
+
+namespace android {
+
+class TunerCallbackInterface : public virtual RefBase
+{
+public:
+    virtual void onEvent(radio_hal_event_t *event) = 0;
+
+protected:
+                 TunerCallbackInterface() {}
+    virtual      ~TunerCallbackInterface() {}
+
+};
+
+} // namespace android
+
+#endif // ANDROID_HARDWARE_TUNER_CALLBACK_INTERFACE_H