Vehicle HAL reference impl Part I

Implemented:
  - defined VehicleHal
  - object pool for VehiclePropValue objects
  - batching of vehicle HAL events
  - subscription management

Test: unit tests provided

Bug: b/31971746
Change-Id: Idd2d0aee7b32a975c3db54812be235e13f52905a
diff --git a/vehicle/2.0/default/impl/DefaultVehicleHal.h b/vehicle/2.0/default/impl/DefaultVehicleHal.h
new file mode 100644
index 0000000..7d0b7cb
--- /dev/null
+++ b/vehicle/2.0/default/impl/DefaultVehicleHal.h
@@ -0,0 +1,73 @@
+/*
+ * 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_vehicle_V2_0_impl_DefaultVehicleHal_H_
+#define android_hardware_vehicle_V2_0_impl_DefaultVehicleHal_H_
+
+#include <VehicleHal.h>
+#include <impl/DefaultConfig.h>
+#include <utils/SystemClock.h>
+
+namespace android {
+namespace hardware {
+namespace vehicle {
+namespace V2_0 {
+
+namespace impl {
+
+class DefaultVehicleHal : public VehicleHal {
+public:
+    std::vector<VehiclePropConfig> listProperties() override {
+        return std::vector<VehiclePropConfig>(std::begin(kVehicleProperties),
+                                              std::end(kVehicleProperties));
+    }
+
+    VehiclePropValuePtr get(VehicleProperty property,
+                            int32_t areaId,
+                            status_t* outStatus) override;
+
+    status_t set(const VehiclePropValue& propValue) override;
+
+    status_t subscribe(VehicleProperty property,
+                       int32_t areas,
+                       float sampleRate) {
+        // TODO(pavelm): implement
+        return OK;
+    }
+
+    status_t unsubscribe(VehicleProperty property) {
+        // TODO(pavelm): implement
+        return OK;
+    }
+
+private:
+    status_t getHvacFanSpeed(int32_t areaId, int32_t* outValue);
+    status_t setHvacFanSpeed(int32_t areaId, int32_t value);
+private:
+    int32_t fanSpeedRow1Left = 3;
+    int32_t fanSpeedRow1Right = 5;
+    int32_t brightness = 7;
+};
+
+}  // impl
+
+}  // namespace V2_0
+}  // namespace vehicle
+}  // namespace hardware
+}  // namespace android
+
+
+#endif  // android_hardware_vehicle_V2_0_impl_DefaultVehicleHal_H_