lower = conventional apk
upper = cloudpaging stub, requires cloudpaging feature on installing device.
There's a minimal prefetch - just the executable code for managing/displaying the image files in the obb.
After that, additional app pages or obb pages are served from the paging server on-demand. Only the stub
is on Google Play.
This is a 'best case' for cloudpaging - the app is cloudpaging-cognizant and downloads the slide it will need next, while the current one is displaying.