message: sdk: system: perform initialization in initialization list
diff: #include <glog/logging.h>
  -SystemImpl::SystemImpl() {
  - m_enumerator = DeviceEnumeratorFactory::buildDeviceEnumerator();
  -}
  +SystemImpl::SystemImpl()
  + : m_enumerator(DeviceEnumeratorFactory::buildDeviceEnumerator()) {}
  SystemImpl::~SystemImpl() = default;
  