Get thermal autoshutdown mode updates

This sample app demonstrates how to get thermal autoshutdown mode updates.

1. Implement IThermalShutdownListener interface

class MyThermalShutdownModeListener : public IThermalShutdownListener {
public:
    void onShutdownEnabled() override;
    void onShutdownDisabled() override;
    void onImminentShutdownEnablement(uint32_t imminentDuration) override;
    void onServiceStatusChange(ServiceStatus status) override;
};

2. Get thermal factory instance

auto &thermalFactory = telux::therm::ThermalFactory::getInstance();

3. Prepare initialization callback

std::promise<telux::common::ServiceStatus> p;
auto initCb = [&p](telux::common::ServiceStatus status) {
     std::cout << "Received service status: " << static_cast<int>(status) << std::endl;
     p.set_value(status);
};

4. Get thermal shutdown manager instance

thermShutdownMgr_ = thermalFactory.getThermalShutdownManager(initCb);
if(thermShutdownMgr_ == NULL)
{
    std::cout << APP_NAME << " *** ERROR - Failed to get manager instance" << std::endl;
    return -1;
}

5. Wait for the initialization callback and check the service status

telux::common::ServiceStatus serviceStatus = p.get_future().get();
if(serviceStatus == telux::common::ServiceStatus::SERVICE_AVAILABLE) {
   std::cout << APP_NAME << " Thermal-Shutdown management services are ready !" << std::endl;
} else {
   std::cout << APP_NAME << " *** ERROR - Unable to initialize Thermal-Shutdown management "
                            "services" << std::endl;
   return -1;
}

6. Instantiate MyThermalStateListener

auto myThermalModeListener = std::make_shared<MyThermalShutdownModeListener>();

7. Register for updates on thermal autoshutdown mode and its management service status

thermShutdownMgr_->registerListener(myThermalModeListener);

8. Wait for the Thermal auto shutdown mode updates

// Avoid long blocking calls when handling notifications
void MyThermalShutdownModeListener::onShutdownEnabled() {
     std::cout << std::endl << "**** Thermal auto shutdown mode enabled ****" << std::endl;
}
void MyThermalShutdownModeListener::onShutdownDisabled() {
     std::cout << std::endl << "**** Thermal auto shutdown mode disabled ****" << std::endl;
}
void MyThermalShutdownModeListener::onImminentShutdownEnablement(uint32_t imminentDuration) {
     std::cout << std::endl << "**** Thermal auto shutdown mode will be enabled in "
         << imminentDuration << " seconds ****" << std::endl;
}

9. Implement onServiceStatusChange callback to know when thermal shutdown management service goes down

// When the thermal management service goes down, this API is invoked
// with status UNAVAILABLE. All thermal auto shutdown mode notifications
// stopped until the status becomes AVAILABLE again.
void MyThermalShutdownModeListener::onServiceStatusChange(ServiceStatus status) {
     std::cout << std::endl << "**** Thermal-Shutdown management service status update ****" << std::endl;
     // Avoid long blocking calls when handling notifications
}