AndroidLauncher3/1300_r83/raw/packages/apps/Launcher3/res/layout/home_settings.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/filter_box"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginHorizontal="@dimen/developer_options_filter_margins"
        android:hint="@string/developer_options_filter_hint"
        android:visibility="gone"
        android:inputType="text"
        android:maxLines="1"
        android:imeOptions="actionDone"
        />

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@android:id/list_container"/>
</LinearLayout>