It is extremely good to have this kind of project. There are not many places when you can have a look at how real apps (ie apps that are not trivial and deploy

It is extremely good to have this kind of project. There are not many places when you can have a look at how real apps (ie apps that are not trivial and deployed to real users) are architectured. For this kind of real project with some scale, yes you are going to have a couple of libraries, a wear app and some flavors. Also, the structure is pretty much intended to be abstracted by Android Studio.