Multiple Games

I want to have multiple unreal engine games in a single application. My end goal is to be able to launch different 2d mini-games from the app.

There is a thread that asks the same thing for iOS here

There does not seem to be an answer to the question though.

I would like to use Android Studio to create the menus and navigation. Then have a button that will launch the game. My reasoning for this is battery consumption. I have not worked with UE4 and I fear if I make all the menus in UE it will burn through the users battery, although I am not sure about this and could be wrong. A lot of the users time will be spent in the menus, not just the mini-games.

So my questions are:
Is it possible to launch UE games from an android studio created menu?
Would I be saving any battery life by going this route?