Enable updating DavDroid parameters
For accounts who use a hidden DavDroid interface to synchronize (Webdav-webcal, /e/, Google, ...), it would be great to have access to the usual DavDroid options.
The most useful one would be for me to configure the way contact groups are handled (the default, independent v-cards, does not correspond to my usage, I'd rather configure groups as a contact category).
This parameters' page could be reached from the account manager if possible, or as with a regular DavDroid installation, by enabling to launch the app and configure accounts from there.