[Expressive design] Update DropDownPreference style

<?xml version="1.0" encoding="utf-8"?>

<!--

  Copyright (C) 2025 The Android Open Source Project

  Licensed under the Apache License, Version 2.0 (the "License");

  you may not use this file except in compliance with the License.

  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software

  distributed under the License is distributed on an "AS IS" BASIS,

  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  See the License for the specific language governing permissions and

  limitations under the License.

  -->

<!-- We use a FrameLayout as we want to place the invisible spinner on top of the other views -->

<FrameLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="wrap_content">

    <!-- This spinner should be invisible in the layout and take up no space, when the Preference

         is clicked the dropdown will appear from this location on screen. -->

    <Spinner

        android:id="@+id/spinner"

        android:layout_width="0dp"

        android:layout_height="wrap_content"

        android:layout_marginStart="@dimen/settingslib_expressive_space_large3"

        android:layout_marginLeft="@dimen/settingslib_expressive_space_large3"

        android:visibility="invisible" />

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:minHeight="@dimen/settingslib_expressive_space_large3"

        android:gravity="center_vertical"

        android:clipToPadding="false"

        android:baselineAligned="false"

        android:filterTouchesWhenObscured="false">

        <include layout="@layout/settingslib_expressive_preference_icon_frame"/>

        <include layout="@layout/settingslib_expressive_preference_text_frame"/>

        <!-- Preference should place its actual preference widget here. -->

        <LinearLayout

            android:id="@android:id/widget_frame"

            android:layout_width="wrap_content"

            android:layout_height="match_parent"

            android:gravity="end|center_vertical"

            android:paddingStart="@dimen/settingslib_expressive_space_small1"

            android:paddingEnd="0dp"

            android:orientation="vertical"/>

    </LinearLayout>

</FrameLayout>

 No newline at end of file

    </style>

    <style name="SettingsLibPreference.DropDown.Expressive">

        <item name="layout">@layout/settingslib_expressive_preference_dropdown</item>

    </style>

    <style name="SettingsLibPreference.SwitchPreference.Expressive"/>