fix the api level filter (wasn't greying out APIs on page load)

Change-Id: Iaafe8c0652856eaff6725491f21581969e94f430
diff --git a/tools/droiddoc/templates-sdk/assets/js/docs.js b/tools/droiddoc/templates-sdk/assets/js/docs.js
index ba65e44..2d72ed5 100644
--- a/tools/droiddoc/templates-sdk/assets/js/docs.js
+++ b/tools/droiddoc/templates-sdk/assets/js/docs.js
@@ -183,6 +183,7 @@
         $("#nav-x li.google a").addClass("selected");
       } else {
         $("#nav-x li.reference a").addClass("selected");
+        changeApiLevel();  // turn things grey
       }
     } else if ((rootDir == "tools") || (rootDir == "sdk")) {
       $("#nav-x li.tools a").addClass("selected");