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
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:textColorHighlight="@color/red"
android:textSize="18sp"
android:typeface="normal"
android:textStyle="bold"
android:id="@+id/contactlist_group"></TextView>