fix compatibility with datamaker package

com.unity.perception/Runtime/GroundTruth/Exporters/Coco/CocoExporter.cs

 
         public void OnAnnotationRegistered<TSpec>(Guid annotationId, TSpec[] values)
         {
-            if (annotationId.ToString() == BoundingBox2DLabeler.annotationId)
+            if (annotationId.ToString() == BoundingBox2DLabeler.annotationIdForCocoExport)
             {
                 m_ReportingObjectDetection = true;
                 m_ObjectDetectionCategories = new CocoTypes.ObjectDetectionCategories
                 }
             }
 
-            if (annotationId.ToString() == KeypointLabeler.annotationId)
+            if (annotationId.ToString() == KeypointLabeler.annotationIdForCocoExport)
             {
                 m_ReportingKeypoints = true;
                 var categories = new CocoTypes.KeypointCategory[values.Length];

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

         /// <summary>
         /// The GUID id to associate with the annotations produced by this labeler.
         /// </summary>
-        public static string annotationId = "f9f22e05-443f-4602-a422-ebe4ea9b55cb";
+        public string annotationId = "f9f22e05-443f-4602-a422-ebe4ea9b55cb";
+
+        /// <summary>
+        /// The annotation ID that the COCO exporter will use to know whether an ID is coming from a bounding box 2 labeler.
+        /// </summary>
+        public static string annotationIdForCocoExport = "f9f22e05-443f-4602-a422-ebe4ea9b55cb";
+
         /// <summary>
         /// The <see cref="IdLabelConfig"/> which associates objects with labels.
         /// </summary>

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

         /// <summary>
         /// The GUID id to associate with the annotations produced by this labeler.
         /// </summary>
-        public static string annotationId = "8b3ef246-daa7-4dd5-a0e8-a943f6e7f8c2";
+        public string annotationId = "8b3ef246-daa7-4dd5-a0e8-a943f6e7f8c2";
+
+        /// <summary>
+        /// The annotation ID that the COCO exporter will use to know whether an ID is coming from a keypoint labeler.
+        /// </summary>
+        public static string annotationIdForCocoExport = "8b3ef246-daa7-4dd5-a0e8-a943f6e7f8c2";
+
         /// <summary>
         /// The <see cref="IdLabelConfig"/> which associates objects with labels.
         /// </summary>
             return jsons;
         }
     }
-}
+}