title: Update Android app in COSU device
body: <p>I am working of app support <a href="https://developer.android.com/work/cosu.html" rel="noreferrer">COSU app android</a>. The app is working fine for me but I am not understand how user will update our app, because COSU app user can't access any other application even google play store. So now the question is that how user will update our application without google play access.
   I have one solutin download app from our server, but in this case user will lose save data like the data we are storing in SharedPreference. Please guide me if you have any other solution for that. Thank in advence </p>