I don't know any game that's bigger than 2gb on Android. I've also had a chat with the engine developer and he told me there's currently no way to realize that within the engine :/
Pale Carnations has a app size of 2.67 gb and things are running fine. I think you can ask whoever does their apps how they were able to make things fit. There was another game that had a 2gb size as well but I forget the name.
