Sync the Starred/Favorite property of contacts

[t-m-w]

This is more of a wishlist item than a bug.

When a contact is starred (added to favorites) or unstarred, there is a new entry in the change journal, but the only difference is the revision number. This is the case whether using the built-in contacts app or Simple Contacts, both of which use the same mechanism for determining and setting starred contacts.

This is not a standardized component of CardDav, but it is a standard feature of Android. Apparently at one point, Davx5 stored this info in the X-DAVDROID-STARRED category, but I haven't verified that.

I've used EteSync for years and across ROMs, and it's worked beautifully. Having to scroll through and set my favorite contacts after a device wipe is the only hassle, and it's not a huge one, but as I get older, I feel that the less I have to remember, the fewer headaches! I'm not aware of any app that can synchronize, back up, or restore this data — unless it actually works with Davx5, and I'm not certain of that — but the fact that Simple Contacts can read and write this info tells me that it's at least possible to do.

I can provide device details and other info if this is actually a bug, but I don't think it is.

[tasn]

I think we may just create a "Starred" group instead. This will make sure that it syncs correctly to all of the devices.

[sciurius]

Now modern Android systems have decent 'do not disturb' facilities, being able to sync favourites becomes more than a wish. It's a necessity.
Why? Because one of the handy do-not-disturb settings is to block phone calls from everyone unless the caller is marked favourite.
Favourites are too important to leave (only) on the (vulnerable) mobile.