arc: Handle ARC events in MD Settings

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

 <link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/cr/ui/focus_without_ink.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/paper-button/paper-button.html">
 <link rel="import" href="android_apps_browser_proxy.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../prefs/prefs_behavior.html">
 <link rel="import" href="../settings_shared_css.html">
 
 <dom-module id="settings-android-apps-subpage">
   <template>
     <style include="settings-shared"></style>
 
     <div id="manageApps" class="settings-box first"
         on-keydown="onManageAndroidAppsKeydown_"
         on-tap="onManageAndroidAppsTap_" actionable
-        hidden="[[!androidAppsInfo_.appReady]]">
+        hidden="[[!androidAppsInfo.settingsAppAvailable]]">
       <div class="start">
         <div>$i18n{androidAppsManageApps}</div>
       </div>
       <button class="icon-external" is="paper-icon-button-light">
       </button>
     </div>
 
     <template is="dom-if" if="[[allowRemove_(prefs.arc.enabled.*)]]">
       <div id="remove" class="settings-box" actionable on-tap="onRemoveTap_">
         <div class="start">$i18n{androidAppsRemove}</div>
@@ skipping 17 matching lines @@
         <paper-button class="action-button"
             on-tap="onConfirmDisableDialogConfirm_">
           $i18n{androidAppsDisableDialogRemove}
         </paper-button>
       </div>
     </dialog>
 
   </template>
   <script src="android_apps_subpage.js"></script>
 </dom-module>