Correction bug cursor adapter when groups are empty.
Between service - ui : Send now String accountName instead of Account account.
ContactList can sync manual in the menu
<?xml version="1.0" encoding="utf-8"?>
<sync-adapter
xmlns:android="http://schemas.android.com/apk/res/android"
android:contentAuthority="com.android.contacts"
android:accountType="com.beem.project.com" />