message: Send UI.ChangeRegistration for background application after PTU
diff: @@ -4550,11 +4550,10 @@ void ApplicationManagerImpl::OnUpdateHMIAppType(
  const mobile_apis::HMILevel::eType app_hmi_level =
  (*it)->hmi_level(mobile_apis::PredefinedWindows::DEFAULT_WINDOW);
  - if (app_hmi_level == mobile_api::HMILevel::HMI_BACKGROUND) {
  +
  MessageHelper::SendUIChangeRegistrationRequestToHMI(*it, *this);
  - } else if ((app_hmi_level == mobile_api::HMILevel::HMI_FULL) ||
  + if ((app_hmi_level == mobile_api::HMILevel::HMI_FULL) ||
  (app_hmi_level == mobile_api::HMILevel::HMI_LIMITED)) {
  - MessageHelper::SendUIChangeRegistrationRequestToHMI(*it, *this);
  state_controller().SetRegularState(
  *it,
  mobile_apis::PredefinedWindows::DEFAULT_WINDOW,
  