Android WebView app template

We have a number of WP websites built specifically for use as Android WebView apps. Due to our programmer falling ill, we need someone to build an Android Studio app template which we can use multiple times to load these sites - each bundled as individual apps. We will need a form of user guide showing us the code we need to change to load each of the websites. The app shell should be built so it features an AdMob interstitial advert on opening. Ideally, we would have the option to feature further interstitials if required - perhaps after the user has opened 5 more pages. Either that or we might want the ability to feature a banner advert at the bottom of pages (in the apps). These extra ads aren't essential - however, we do definitely need the first interstitial to feature. The process we need on opening is: splash screen with logo > interstitial advert loads > WebView opens with content. We also need the template to be able to load different language versions if present (built in WPML) and also allow GPS functions where applicable ie the user will need to grant location services on loading the app. If you're interested in this job, please let us know your timescales / costs. We can provide further information and previous examples should you need them. Ideally, you will have already built something similar which just needs to be annotated for our use.