Introduce Navigation component to Wireguard-Android

[Lao Deng]

I am going to add some un-related functions to Wireguard-Android . The final app. should look like the demo of com.google.android.material.bottomnavigation.BottomNavigationView ,
 which  consists of a  bottom navigation component and several  independent fragments( or activities ) . 


I am wondering how to introduce this navigation component to the wireguard-android  project with the least modification :) Could you please shed some light on it ?
Thankyou for your attention :)