Screen rotation removes App filter

[ngosang]

Gotify Android: 2.2.0

Steps to reproduce:

1. Configure Gotify Server with several Apps (so you can filter by App)
2. Enable Screen auto-rotate in Android
3. In Gotify Android select just one App (filter messages)
4. Rotate the Screen
5. The App filter is lost and you see all notifications from all Apps

Expected behavior:
You should keep the filter when the screen is rotated.