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

chrome/browser/resources/settings/android_apps_page/android_apps_page.js

Index: chrome/browser/resources/settings/android_apps_page/android_apps_page.js
diff --git a/chrome/browser/resources/settings/android_apps_page/android_apps_page.js b/chrome/browser/resources/settings/android_apps_page/android_apps_page.js
index b7fd76aac87b29082b4052171ff9203c17e6be01..861731780652ab51607d5907c609012ddb6e61da 100644
--- a/chrome/browser/resources/settings/android_apps_page/android_apps_page.js
+++ b/chrome/browser/resources/settings/android_apps_page/android_apps_page.js
@@ -21,6 +21,18 @@ Polymer({
 
     /** @private {!AndroidAppsInfo|undefined} */
     androidAppsInfo_: Object,
+
+    /** @private {!Map<string, string>} */
+    focusConfig_: {
+      type: Object,
+      value: function() {
+        var map = new Map();
+        map.set(
+            settings.Route.ANDROID_APPS_DETAILS.path,
+            '#android-apps .subpage-arrow');
+        return map;
+      },
+    },
   },
 
   /** @private {?settings.AndroidAppsBrowserProxy} */