res/xml/split_configuration.xml

<?xml version="1.0" encoding="utf-8"?>
<resources
    xmlns:window="http://schemas.android.com/apk/res-auto">
    <!-- Automatically split the following activity pairs. -->
    <SplitPairRule
        window:splitRatio="@dimen/activity_split_ratio"
        window:splitLayoutDirection="locale"
        window:splitMinWidthDp="@integer/min_width_split"
        window:splitMaxAspectRatioInPortrait="alwaysAllow"
        window:finishPrimaryWithSecondary="never"
        window:finishSecondaryWithPrimary="always"
        window:clearTop="false">
        <SplitPairFilter
            window:primaryActivityName="com.android.launcher3.settings.SettingsActivity"
            window:secondaryActivityName="com.android.launcher3.settings.SettingsActivity"/>

    </SplitPairRule>
</resources>