Fix that the padding top/bottom of the preview was wrong when display size is smallest.

Add the padding from settingslib into.

Bug: 241247826
Test: manual test
Change-Id: Ia5f72bc6d6591a6245e623a10bdd3656935a38c4
diff --git a/res/layout/accessibility_text_reading_preview.xml b/res/layout/accessibility_text_reading_preview.xml
index 9caed30..91fb0a0 100644
--- a/res/layout/accessibility_text_reading_preview.xml
+++ b/res/layout/accessibility_text_reading_preview.xml
@@ -18,6 +18,7 @@
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:paddingVertical="@dimen/settingslib_illustration_padding"
     android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
     android:paddingStart="?android:attr/listPreferredItemPaddingStart">