Support for Google CardDAV is new. Because of a vCard encoding issue
on the server side, spaces in long notes may get removed. Like
Evolution, SyncEvolution does not yet support some of the advanced
features of the server, in particular custom labels for phone numbers,
emails and addresses. Likewise, some client properties are not
supported by the server: CALURI, CATEGORIES, FBURL, GEO and ROLE are
not supported. Of ORG, only the first two components are supported.
Currently, properties not supported by one side get lost in a full
roundtrip sync.

To solve this we need to add CtCap support to local sync, with CtCap being sent
by the CardDAV side depending on who it is talking to.