[Payments] Update autofill/payments spacings

chrome/android/java/res/layout/autofill_profile_editor.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. -->
 
 <!-- EditText views in FloatLabelLayout require both hint and contentDescription to be set

[Ian Wen, 2016/07/01 19:19:03]

After we stop using FloatLabelLayout, is it still true?

[gone, 2016/07/01 23:00:49]

TextInputLayout doesn't seem to clear hints; removing the comment.

      to work correctly for accessibility because FloatLabelLayout sometimes clear hint. -->
 <!--suppress ContentDescription -->
 <merge
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto" >
 
-    <!-- Editable fields for the profile -->
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:orientation="vertical"
-        android:layout_marginStart="@dimen/pref_autofill_field_horizontal_padding"
-        android:layout_marginEnd="@dimen/pref_autofill_field_horizontal_padding"
-        android:paddingBottom="5dp" >
-        <TextView
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:focusable="true"
-            android:textAppearance="@style/PreferenceFloatLabelTextAppearance"
-            android:text="@string/autofill_profile_editor_country"
-            android:paddingBottom="8dp" />
-        <Spinner
-            android:id="@+id/countries"
-            android:layout_width="fill_parent"
-            android:layout_height="wrap_content" />
-        <View style="@style/PreferenceSpinnerUnderlineView" />
-    </LinearLayout>
+    <!-- Country -->
+    <include layout="@layout/payment_request_editor_dropdown" />
 
+    <!-- Country specific address information
+         Bottom margins are handled by the views that are added to this layout.
+    -->
     <LinearLayout
         android:id="@+id/autofill_profile_widget_root"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="vertical" >
-    </LinearLayout>
+        android:orientation="vertical" />
 
+    <!-- Phone number -->
     <org.chromium.chrome.browser.widget.CompatibilityTextInputLayout
         android:id="@+id/phone_number_label"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content" >
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="@dimen/pref_autofill_content_spacing" >
+
         <EditText
             android:id="@+id/phone_number_edit"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:imeOptions="flagNoExtractUi"
             android:inputType="phone"
             android:singleLine="true"
             android:hint="@string/autofill_profile_editor_phone_number" />
+
     </org.chromium.chrome.browser.widget.CompatibilityTextInputLayout>
 
+    <!-- Email address -->
     <org.chromium.chrome.browser.widget.CompatibilityTextInputLayout
         android:id="@+id/email_address_label"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" >
+
         <EditText
             android:id="@+id/email_address_edit"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:imeOptions="flagNoExtractUi"
             android:inputType="textEmailAddress"
             android:singleLine="true"
             android:hint="@string/autofill_profile_editor_email_address" />
+
     </org.chromium.chrome.browser.widget.CompatibilityTextInputLayout>
 
 </merge>