android_packages_apps_Launcher3/res/layout-land/longpress_cling.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:launcher="http://schemas.android.com/apk/res-auto/com.android.launcher3"
    android:id="@+id/longpress_cling"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/cling_scrim_background"
    android:orientation="vertical" >

    <Space
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <FrameLayout
        android:id="@+id/cling_content"
        android:layout_width="360dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:background="@drawable/cling_bg" />

    <Space
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="2" />

</LinearLayout>