Revert spinner caret size to 24x24dp

<layer-list xmlns:android="http://schemas.android.com/apk/res/android"

            android:paddingMode="stack"

            android:paddingStart="0dp"

            android:paddingEnd="48dp"

            android:paddingEnd="24dp"

            android:paddingLeft="0dp"

            android:paddingRight="0dp">

    <item

        android:gravity="end|center_vertical"

        android:width="48dp"

        android:height="48dp">

        <ripple

            android:color="?attr/colorControlHighlight"

            android:radius="24dp" />

    </item>

        android:width="24dp"

        android:height="24dp"

        android:drawable="@drawable/control_background_40dp_material" />

    <item

        android:drawable="@drawable/ic_spinner_caret"

        android:gravity="end|center_vertical"

        android:width="24dp"

        android:height="24dp"

        android:end="12dp" />

        android:height="24dp" />

</layer-list>