Use different icon for stopped case

Co-authored-by: M. Fatih Cırıt <[email protected]>

common/tier4_state_rviz_plugin/src/autoware_state_panel.cpp

@@ -609,7 +609,7 @@ void AutowareStatePanel::onMotion(const MotionState::ConstSharedPtr msg)
       break;
 
     default:
-      state = None;
+      state = Danger;
       bgColor = QColor("#84c2e6");
       break;
   }