[Payments] Increase spacing for payment request credit card and address editors

chrome/android/java/res/layout/payment_request_editor.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. -->
 
 <!-- PaymentRequestUI editor dialog. -->
 <RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:chrome="http://schemas.android.com/apk/res-auto" >
 
@@ skipping 14 matching lines @@
         android:layout_width="match_parent"
         android:layout_below="@id/action_bar"
         android:layout_alignParentBottom="true"
         android:layout_alignParentStart="true"
         android:layout_alignParentEnd="true" >
 
         <LinearLayout
             android:id="@+id/contents"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:paddingTop="@dimen/payments_section_large_spacing"
             android:paddingStart="@dimen/pref_autofill_content_spacing"
             android:paddingEnd="@dimen/pref_autofill_content_spacing"
             android:orientation="vertical" />
 
     </org.chromium.chrome.browser.payments.ui.FadingEdgeScrollView>
 
     <!-- Shadow overlaps the FadingEdgeScrollView. -->
     <org.chromium.chrome.browser.widget.FadingShadowView
         android:id="@+id/shadow"
         android:layout_width="match_parent"
         android:layout_height="10dp"
         android:layout_below="@id/action_bar"
         android:layout_alignParentStart="true"
         android:layout_alignParentEnd="true" />
 
 </RelativeLayout>