Update voice interaction OOBE with new UX spec

chrome/browser/resources/chromeos/login/oobe_dialog.js

 // 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.
 
 Polymer({
   is: 'oobe-dialog',
 
   properties: {
     /**
      * Controls visibility of the bottom-buttons element.
@@ skipping 28 matching lines @@
     },
 
     /**
      * Switches styles to "Welcome screen".
      */
     welcomeScreen: {
       type: Boolean,
       value: false,
       reflectToAttribute: true,
     },
+
+    android: {
+      type: Boolean,
+      value: false,
+    },
   },
 
   focus: function() {
     /* When Network Selection Dialog is shown because user pressed "Back"
        button on EULA screen, display_manager does not inform this dialog that
        it is shown. It ouly focuses this dialog.
        So this emulates show().
        TODO (alemate): fix this once event flow is updated.
     */
     this.show();
   },
 
   /**
    * This is called from oobe_welcome when this dialog is shown.
    */
   show: function() {
     var focusedElements = this.getElementsByClassName('focus-on-show');
     if (focusedElements.length > 0)
       focusedElements[0].focus();
 
     this.fire('show-dialog');
   },
 });