WordPress/src/main/res/drawable/preferences_divider.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item
        android:left="-10dp"
        android:right="-10dp">

        <shape
            android:shape="rectangle">

            <solid
                android:color="@color/site_settings_pref_divider_color" />

        </shape>

    </item>

</layer-list>