app/src/main/res/xml/pref_face.xml

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
  <PreferenceCategory
      android:key="faces"
      android:title="Faces">

    <Preference android:title="Create face" android:key="create_face" />

    <PreferenceScreen android:title="List faces" android:key="list">
        <intent android:action="android.intent.action.VIEW"
                android:targetPackage="net.named_data.nfd"
                android:targetClass="net.named_data.nfd.FaceListActivity" />
    </PreferenceScreen>

  </PreferenceCategory>
</PreferenceScreen>