Preferences are not included in app backup

[lucasmz-dev]

Sayboard excludes things from backup: https://github.com/ElishaAz/Sayboard/blob/master/app/src/main/res/xml/data_extraction_rules.xml

which makes sense!

But what I notice is that it seems like it is meant to allow preferences? but it actually does not get included in the Seedvault backup, well, nothing is. Maybe something changed since then?
It would be nice to have settings back up, or have everything but downloaded models be backed up