session-android/res/layout/contact_selection_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:layout_gravity="center"
              android:layout_height="fill_parent"
              android:layout_width="fill_parent"
              android:orientation="vertical"
              xmlns:android="http://schemas.android.com/apk/res/android">

    <org.thoughtcrime.securesms.components.ContactFilterToolbar
            android:id="@+id/toolbar"
            android:layout_height="?attr/actionBarSize"
            android:layout_width="match_parent"
            android:minHeight="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            android:theme="@style/TextSecure.LightActionBar" />

        <fragment android:id="@+id/contact_selection_list_fragment"
                  android:layout_width="match_parent"
                  android:layout_height="match_parent"
                  android:name="org.thoughtcrime.securesms.ContactSelectionListFragment" />

</LinearLayout>