Changed network connection check logic

[ISO-B]

Network connection no longer requires internet connection. Socket connection status is used instead for checking if server is reachable. If there is no socket connection available eq. before connecting to server then connection type is used to for network connection check.

This should fix #566

Test cases, tested with Android 11 and 14:

1. Wifi connection with access to internet. Everything worked as previously
2. Wifi connection without access to internet. I was able to change server, browse library and stream content
3. Cellular connection with VPN to allow access to server. Everything worked as previously
4. Cellular connection without VPN, no access to server. Offline mode, but I was able to try connection to different server/adding new server
5. No wifi or cellular connection. Offline mode, adding new server shows no network connection.

[advplyr]

Thanks!

[advplyr]

I'm confused about this change actually. Was val.connected false in your testing when connectionType was not none?

[ISO-B]

I completely ignored val.connected value based on assumption that if connectionType is none there can't be usable connection. I assume that wifi, cellular and unkown values for connectionType indicate that device is connected to some kind of network. That network might or might not have connection to internet which is indicated by val.connected. This should let app to work without internet connection, like with lan server. Like wise it should let app to work as offline if your server is on internet and you don't have internet connection.