If you're still looking into help for the Android port due to size there are games with bigger sizes who have been able to get it to work. Might look into contacting their porter and see if they're willing to help out.
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.
