Update and unify nine-patch files for content suggestion and omnibox cards

chrome/android/java/res/layout/new_tab_page_action_card.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2016 The Chromium Authors. All rights reserved.
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file. -->
 
 <!-- Unlike regular cards, we use a material standard 8dp padding instead of the
      bigger one related to the peeking behaviour. This card will only have
      buttons, that have themselves some padding. We just stay within the
      material specifications. -->
 <LinearLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical"
     android:padding="8dp"
-    android:background="@drawable/ntp_card_single">
+    android:background="@drawable/card_single">
 
 
     <!-- Using some standard metrics (minWidth, paddings) to override the
          special ones used in ButtonCompatBorderless -->
     <Button
       android:id="@+id/action_button"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:gravity="center_vertical|center_horizontal"
       android:minWidth="0dp"
       android:paddingEnd="16dp"
       android:paddingStart="16dp"
       android:text="@string/more"
       android:textAllCaps="true"
       android:textColor="@color/light_active_color"
       style="@style/ButtonCompatBorderless" />
 </LinearLayout>