xmnboy I believe you work for Intel and are in contact with the XDK team, I'd like to request a statement about this.
Would it be possible for the XDK team to provide us Construct 2 Dev's a simple tool to create an APK expansion file?
I personally don't know much about the tech behind APK expansions but I assume that it could be possible to store all C2 files
inside the expansion and let the browser runtime itself (which is inside the default APK) load the content from the expansion?
If the mentioned way above isn't possible, we could also do a workaround by having the media and texture files on the expansion and run the game itself as usual over the default APK. C2 is allowing us to set the paths to those 2 folders which contain the majority of game assets, this basically means that we would need some sort of "APK expansion creator" which imports those two folders and provides us the paths to those folders.
Again, those are just speculations and I don't know much about the whole APK expansion process.