NetworkChangeNotifierAndroid could miss IP address changes if a user were to modify the IP address settings for a WiFi connection.
DnsConfigWatcherPosix could miss private DNS changes if a user were to modify the private DNS settings for networking.

Admittedly these are probably rare events that only power-users engage in, but we should catch and handle these events.  Perhaps via 	android.net.ConnectivityManager.NetworkCallback.onLinkPropertiesChanged().