power/stats: Add default implementation

Add default implementation for power.stats HAL

BUG: 118777168
BUG: 111185513

Test: run vts -m VtsHalPowerStatsV1_0Target
Change-Id: Id81291f58a5cdfa0cc1f56356001b2862df0dbc2
(cherry picked from commit f94dda77a1e064f2c66d3bd185feda96a9bdcc1e)
Merged-In: Id81291f58a5cdfa0cc1f56356001b2862df0dbc2
diff --git a/power/stats/1.0/default/service.cpp b/power/stats/1.0/default/service.cpp
new file mode 100644
index 0000000..80649f5
--- /dev/null
+++ b/power/stats/1.0/default/service.cpp
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2018 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 "android.hardware.power.stats@1.0-service"
+
+#include <android/log.h>
+#include <hidl/HidlTransportSupport.h>
+
+#include "PowerStats.h"
+
+using android::OK;
+using android::sp;
+using android::status_t;
+
+// libhwbinder:
+using android::hardware::configureRpcThreadpool;
+using android::hardware::joinRpcThreadpool;
+
+// Generated HIDL files
+using android::hardware::power::stats::V1_0::IPowerStats;
+using android::hardware::power::stats::V1_0::implementation::PowerStats;
+
+int main(int /* argc */, char** /* argv */) {
+    ALOGI("power.stats service 1.0 is starting.");
+
+    android::sp<IPowerStats> service = new PowerStats();
+    if (service == nullptr) {
+        ALOGE("Can not create an instance of power.stats HAL Iface, exiting.");
+        return 1;
+    }
+
+    configureRpcThreadpool(1, true /*callerWillJoin*/);
+
+    status_t status = service->registerAsService();
+    if (status != OK) {
+        ALOGE("Could not register service for power.stats HAL Iface (%d), exiting.", status);
+        return 1;
+    }
+
+    ALOGI("power.stats service is ready");
+    joinRpcThreadpool();
+
+    // In normal operation, we don't expect the thread pool to exit
+    ALOGE("power.stats service is shutting down");
+    return 1;
+}