session-android/res/layout/conversation_fragment.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="fill_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <android.support.v7.widget.RecyclerView
            android:id="@android:id/list"
            android:layout_width="fill_parent"
            android:layout_height="0dp"
            android:layout_weight="1.0"
            android:scrollbars="vertical"
            android:cacheColorHint="?conversation_background" />

</LinearLayout>