split_configuration_finish_behavior.xml

<resources xmlns:window="http://schemas.android.com/apk/res-auto">
    <SplitPairRule
        window:finishPrimaryWithSecondary="true"
        window:finishSecondaryWithPrimary="true"
        window:splitRatio="0.4">
        <SplitPairFilter
            window:primaryActivityName=".list.ListActivity"
            window:secondaryActivityName=".details.DetailsActivity" />
    </SplitPairRule>
</resources>