fixed a bug a visualization test and per labeler enabled state

com.unity.perception/Runtime/GroundTruth/Labelers/CameraLabeler.cs

         internal void InternalCleanup() => Cleanup();
         internal void InternalVisualize() => OnVisualize();
 
-        bool m_ShowVisualizations;
+        bool m_ShowVisualizationsForLabeler;
 
         /// <summary>
         /// Turns on/off the labeler's realtime visualization capability. If a labeler does not support realtime
                 if (!supportsVisualization)
                     return false;
 
-                return perceptionCamera && perceptionCamera.showVisualizations;
+                return perceptionCamera && perceptionCamera.showVisualizations && m_ShowVisualizationsForLabeler;
-                if (value != m_ShowVisualizations)
+                if (value != m_ShowVisualizationsForLabeler)
-                    m_ShowVisualizations = value;
+                    m_ShowVisualizationsForLabeler = value;
-                    OnVisualizerEnabledChanged(m_ShowVisualizations);
+                    OnVisualizerEnabledChanged(m_ShowVisualizationsForLabeler);
                 }
             }
         }

com.unity.perception/Tests/Runtime/GroundTruthTests/VisualizationTests.cs

             var labeler1 = new ObjectCountLabeler(cfg);
             labeler1.objectCountMetricId = "a1da3c27-369d-4929-aea6-d01614635ce2";
             var labeler2 = new ObjectCountLabeler(cfg);
-            labeler1.objectCountMetricId = "b1da3c27-369d-4929-aea6-d01614635ce2";
+            labeler2.objectCountMetricId = "b1da3c27-369d-4929-aea6-d01614635ce2";
 
             perceptionCamera.AddLabeler(labeler1);
             perceptionCamera.AddLabeler(labeler2);