Stat AI reports AI rendered regardless of frustum

This is a regression tested in //UE4/Release-4.27 CL#18319896

Stat AI reports AI rendered regardless of frustum setting. 

1. Create a new Third Person template project
2. Place several BP_ThirdPersonCharacter around the level making sure some are occluded
3. Play in Editor
4. Execute the command Stat AI

Expected Results:
Any AI not in camera view is not reported to the AI Rendered

Actual Results:
All AI are reported to AI Rendered