[Android] [RTL] Convert Left/Right attributes to Start/End attributes

content/public/android/java/res/layout/month_picker.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright (c) 2012 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.
 -->
 
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:layout_gravity="center_horizontal"
     android:orientation="horizontal"
     android:gravity="center">
 
     <LinearLayout android:id="@+id/pickers"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_weight="1"
         android:orientation="horizontal"
         android:gravity="center">
 
         <!-- Month -->
         <NumberPicker
             android:id="@+id/month"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginLeft="16dip"
-            android:layout_marginRight="16dip"
+            android:layout_marginStart="16dip"
+            android:layout_marginEnd="16dip"
             android:focusable="true"
             android:focusableInTouchMode="true"
             android:contentDescription="@string/accessibility_date_picker_month"
             />
 
         <!-- Year -->
         <NumberPicker
             android:id="@+id/year"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginLeft="16dip"
-            android:layout_marginRight="16dip"
+            android:layout_marginStart="16dip"
+            android:layout_marginEnd="16dip"
             android:focusable="true"
             android:focusableInTouchMode="true"
             android:contentDescription="@string/accessibility_date_picker_year"
             />
 
     </LinearLayout>
 
 </LinearLayout>