workaround the runuat 5.2/5.3 build issue due to missing IOpenXRHMD.h from epic public headers

Source/SenseGloveTracking/Private/SGTracking/SGXRTracker.cpp

@@ -41,7 +41,9 @@
 #include "Engine/SkeletalMesh.h"
 #include "Engine/World.h"
 #include "GameFramework/WorldSettings.h"
+#if ENGINE_MAJOR_VERSION > 5 && ENGINE_MINOR_VERSION >= 4
 #include "IOpenXRHMD.h"
+#endif  /* ENGINE_MAJOR_VERSION > 5 && ENGINE_MINOR_VERSION >= 4 */
 #include "IOpenXRHMDModule.h"
 #include "IXRTrackingSystem.h"
 #include "OpenXRCore.h"
@@ -994,6 +996,7 @@ bool FSGXRTracker::GetMotionControllerData(
         return false;
     }
 
+#if ENGINE_MAJOR_VERSION > 5 && ENGINE_MINOR_VERSION >= 4
     IOpenXRHMD* OpenXRHMD{XRTrackingSystem->GetIOpenXRHMD()};
     if (!OpenXRHMD)
     {
@@ -1155,6 +1158,9 @@ bool FSGXRTracker::GetMotionControllerData(
     /// TODO
     // This is reportedly a WMR-specific convenience function for rapid prototyping. Not sure if it's useful for OpenXR.
     OutMotionControllerData.bIsGrasped = false;
+#else  /* ENGINE_MAJOR_VERSION > 5 && ENGINE_MINOR_VERSION >= 4 */
+    XRTrackingSystem->GetMotionControllerData(WorldContextObject, Hand, OutMotionControllerData);
+#endif  /* ENGINE_MAJOR_VERSION > 5 && ENGINE_MINOR_VERSION >= 4 */
 
     return OutMotionControllerData.bValid;
 }