fix(app-router): abort cached config reading if disabled

This is a bug that app-router will update with a cached serverURLs even it is disabled in the beginning.

Author: leeyeh

src/app-router.js

@@ -6,6 +6,7 @@ function AppRouter(AV) {
   this.lockedUntil = 0;
   Cache.getAsync('serverURLs')
     .then(data => {
+      if (this.disabled) return;
       if (!data) return this.lock(0);
       const { serverURLs, lockedUntil } = data;
       this.AV._setServerURLs(serverURLs, false);