Issue 2427: sync starred contacts

Description

Sync starred contacts

Screenshots

Technical details

It checks "starred" category from vcf file from ecloud and stars the contact on device. And for starred contacts on device, it adds a category (group membership / label) "starred" before uploading to ecloud.

Tests

Issues

e/backlog#2427 (closed)

10 commandments of code reviews

👪 ❤ https://gitlab.e.foundation/internal/wiki/-/wikis/mobile-team/guidelines/Code-review