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

chrome/android/java/res/layout/payments_request_editor_textview.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. -->
 
 <FrameLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content">
+    android:layout_height="wrap_content"
+    android:layout_marginTop="@dimen/payments_section_small_spacing"
+    android:layout_marginBottom="@dimen/payments_section_small_spacing">
 
     <org.chromium.chrome.browser.widget.CompatibilityTextInputLayout
         android:id="@+id/text_input_layout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
 
         <AutoCompleteTextView
             android:id="@+id/text_view"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:singleLine="true"
             android:imeOptions="flagNoExtractUi" />
     </org.chromium.chrome.browser.widget.CompatibilityTextInputLayout>
 
     <ImageView
         android:id="@+id/action_icon"
         android:layout_width="48dp"
         android:layout_height="48dp"
         android:padding="12dp"
         android:layout_gravity="end"
         android:contentDescription="@null"
         android:visibility="gone"/>
 </FrameLayout>