Gadgetbridge/app/src/main/res/xml/devicesettings_sync_calendar.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <SwitchPreference
        android:defaultValue="false"
        android:icon="@drawable/ic_calendar_sync"
        android:key="sync_calendar"
        android:summary="@string/pref_summary_sync_calendar"
        android:title="@string/pref_title_sync_caldendar" />
    <Preference
        android:dependency="sync_calendar"
        android:icon="@drawable/ic_block"
        android:key="blacklist_calendars"
        android:summary="@string/pref_blacklist_calendars_summary"
        android:title="@string/pref_blacklist_calendars" />
</androidx.preference.PreferenceScreen>