Add single line item with new pill to ADS preview (#6894)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/488551667048375/task/1211542509324051?focus=true

### Description

- Adds an example of a `OneLineListItem` with a “new" pill.

### Steps to test this PR

- [x] Open ADS preview
- [x] Verify that an item with a new pill is in the list

### UI changes
<img width="320" height="2856" alt="Screenshot_20251006_113847"
src="https://github.com/user-attachments/assets/3c133091-fe9d-474c-a574-a326ed50f39e"
/>

Author: joshliebe

design-system/src/main/res/layout/component_one_line_item.xml

@@ -250,6 +250,15 @@
         app:layout_constraintTop_toBottomOf="@id/oneLineListItemWithLongText"
         app:primaryTextTruncated="true"/>
 
-
+    <com.duckduckgo.common.ui.view.listitem.OneLineListItem
+        android:id="@+id/oneLineListItemWithNewPill"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="@dimen/keyline_2"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/oneLineListItemWithLongTextTruncated"
+        app:primaryText="Item with New Pill"
+        app:showNewPill="true" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>