power: add a property for config file

Test: build
Bug: 173222103
Signed-off-by: Wei Wang <wvw@google.com>
Change-Id: I14e7e0aa349e446f6889cbfc9a914f5314438e6b

aidl/power-libperfmgr/service.cpp

@@ -30,16 +30,21 @@ using aidl::google::hardware::power::impl::pixel::Power;
 using aidl::google::hardware::power::impl::pixel::PowerExt;
 using ::android::perfmgr::HintManager;
 
-constexpr char kPowerHalConfigPath[] = "/vendor/etc/powerhint.json";
-constexpr char kPowerHalInitProp[] = "vendor.powerhal.init";
+constexpr std::string_view kPowerHalInitProp("vendor.powerhal.init");
+constexpr std::string_view kConfigProperty("vendor.powerhal.config");
+constexpr std::string_view kConfigDefaultFileName("powerhint.json");
 
 int main() {
-    LOG(INFO) << "Pixel Power HAL AIDL Service with Extension is starting.";
+    const std::string config_path =
+            "/vendor/etc/" +
+            android::base::GetProperty(kConfigProperty.data(), kConfigDefaultFileName.data());
+    LOG(INFO) << "Pixel Power HAL AIDL Service with Extension is starting with config: "
+              << config_path;
 
     // Parse config but do not start the looper
-    std::shared_ptr<HintManager> hm = HintManager::GetFromJSON(kPowerHalConfigPath, false);
+    std::shared_ptr<HintManager> hm = HintManager::GetFromJSON(config_path, false);
     if (!hm) {
-        LOG(FATAL) << "Invalid config: " << kPowerHalConfigPath;
+        LOG(FATAL) << "Invalid config: " << config_path;
     }
 
     // single thread
@@ -61,7 +66,7 @@ int main() {
     LOG(INFO) << "Pixel Power HAL AIDL Service with Extension is started.";
 
     std::thread initThread([&]() {
-        ::android::base::WaitForProperty(kPowerHalInitProp, "1");
+        ::android::base::WaitForProperty(kPowerHalInitProp.data(), "1");
         hm->Start();
     });
     initThread.detach();