Like on iOS, we must synchronosly present if there is a platform view (non texture backed) in the scene. I think this can be observed if the threads are merged, but we lack an easy to use check like [[NSThread currentThread] isMainThread] that is easily accessible in C++. In Java, Looper.getMainLooper().isCurrentThread() would be the closest equivalent.|

I think we probably already track whether or not threads are merged, so perhaps we just need to plumb this through to the contexts.