session-android/res/drawable/conversation_list_divider_shape.xml

<?xml version="1.0" encoding="UTF-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <solid android:color="@color/conversation_list_item_background_read_light" />
        </shape>
    </item>
    <item android:left="83dp" android:right="10dp">
        <shape android:shape="rectangle">
            <solid android:color="@color/conversation_list_divider_light" />
            <size android:height="1px" />
        </shape>
    </item>
</layer-list>