That's a nice idea. I wish stuff like this was builtin. Small suggestion: API level 29 (Android 10) introduced WifiNetworkSuggestion[1], which allows an app to prompt the user to add WiFi credentials to the system. The suggestion has to be sent as an extra in an ACTION_WIFI_ADD_NETWORKS intent[2] (which was added in API 30 for some reason, not sure right now what happens in between).

[1] https://developer.android.com/develop/connectivity/wifi/wifi...

[2] https://developer.android.com/reference/android/provider/Set...