conversations-classic/src/main/res/layout/activity_choose_contact.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="?attr/color_background_primary">

    <ListView
        android:id="@+id/choose_contact_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:listitem="@layout/contact"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"/>

</LinearLayout>