false expiry notification

[efef]

When installing the new client and do a login immediatly an expiry notification will be shown.

1. install Let's Connect! 3.2.1 Android APK
2. configure a server, e.g. vpn-next.tuxed.net
3. connect to a profile that uses OpenVPN
4. see notification in tray that mentions certificate is about to expire (see screenshot)

The expiry is only in >1000 days, so it should not really show this. It can't
be reproduced by removing the server and re-adding the server. It can be
reproduced by deleting the app and installing it again...