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

chrome/android/java/res/values/dimens.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2014 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. -->
 
 <resources>
     <!-- Connection info popup dimensions -->
     <dimen name="connection_info_padding_wide">24dp</dimen>
     <dimen name="connection_info_padding_thin">16dp</dimen>
 
@@ skipping 272 matching lines @@
     <dimen name="ntp_sign_in_promo_margin_top">20dp</dimen>
     <dimen name="ntp_progress_indicator_diameter">56dp</dimen>
     <dimen name="snippets_thumbnail_size">72dp</dimen>
     <!-- The default padding for the peeking card and the amount the card peeks by in the current
          peeking card animation (the calculations assume this is the same). -->
     <dimen name="snippets_padding">16dp</dimen>
     <!-- The amount of the peeking card showing above the fold with the increased visibility UI
          (https://crbug.com/660837). -->
     <dimen name="snippets_peeking_card_peek_amount">32dp</dimen>
     <dimen name="snippets_peeking_card_bounce_distance">10dp</dimen>
-    <dimen name="snippets_card_9_patch_adjustment">2dp</dimen>
+    <dimen name="snippets_card_corner_radius">2dp</dimen>
+    <dimen name="snippets_card_gap">0.5dp</dimen>
     <dimen name="snippets_article_header_height">40dp</dimen>
     <dimen name="snippets_publisher_margin_top_with_article_snippet">16dp</dimen>
     <dimen name="snippets_publisher_margin_top_without_article_snippet">8dp</dimen>
     <!-- This is in sp because we want the icon to scale with the TextView it sits alongside. -->
     <dimen name="snippets_offline_icon_size">18sp</dimen>
 
     <!-- Recent tabs page -->
     <dimen name="recent_tabs_visible_separator_padding">8dp</dimen>
 
     <!-- Snackbars -->
@@ skipping 86 matching lines @@
 
     <!-- Downloads dimensions. -->
     <dimen name="downloads_item_icon_size">48dp</dimen>
     <dimen name="downloads_item_margin">16dp</dimen>
 
     <!--  Miscellaneous dimensions -->
     <dimen name="action_bar_shadow_height">10dp</dimen>
     <dimen name="selectable_list_layout_end_icon">24dp</dimen>
     <dimen name="selectable_list_layout_start_icon_width">64dp</dimen>
 </resources>