MD Settings: Restore focus when exiting various subpages, part 2.

chrome/browser/resources/settings/android_apps_page/android_apps_page.html

 <link rel="import" href="chrome://resources/cr_elements/policy/cr_policy_pref_indicator.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button-light.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../prefs/prefs_behavior.html">
 <link rel="import" href="../settings_page/settings_animated_pages.html">
 <link rel="import" href="../settings_page/settings_subpage.html">
 <link rel="import" href="../settings_shared_css.html">
 <link rel="import" href="android_apps_browser_proxy.html">
 <link rel="import" href="android_apps_subpage.html">
 
 <dom-module id="settings-android-apps-page">
   <template>
     <style include="settings-shared"></style>
 
-    <settings-animated-pages id="pages" section="androidApps">
+    <settings-animated-pages id="pages" section="androidApps"
+        focus-config="[[focusConfig_]]">
       <neon-animatable route-path="default">
         <div id="android-apps" class="settings-box two-line first" actionable
             on-tap="onSubpageTap_">
           <div class="start">
             $i18n{androidAppsPageLabel}
             <div class="secondary" id="secondaryText"
                 inner-h-t-m-l="[[i18n('androidAppsSubtext')]]">
             </div>
           </div>
           <cr-policy-pref-indicator pref="[[prefs.arc.enabled]]"
@@ skipping 25 matching lines @@
           <settings-android-apps-subpage
               android-apps-info="[[androidAppsInfo_]]" prefs="{{prefs}}">
           </settings-android-apps-subpage>
         </settings-subpage>
       </template>
     </settings-animated-pages>
 
   </template>
   <script src="android_apps_page.js"></script>
 </dom-module>