Replaced broken link (#3579)

* Replaced broken link

The previous link outputs a 404 error.

* Fix alphabetical order

* Remove newline

free-courses-en.md

@@ -84,7 +84,11 @@
 * [Programming Mobile Applications for Android Handheld Systems pt. 2](https://www.coursera.org/course/androidpart2)
 * [Programming Mobile Services for Android Handheld Systems: Communication](https://www.coursera.org/course/posacommunication)
 * [Programming Mobile Services for Android Handheld Systems: Concurrency](https://www.coursera.org/course/posaconcurrency)
-* [Udacity Android Course Catalog](https://www.udacity.com/courses#!/android#!/android)
+* [Udacity Android Basics: Data Storage](https://www.udacity.com/course/android-basics-data-storage--ud845)
+* [Udacity Android Basics: Multiscreen Apps](https://www.udacity.com/course/android-basics-multiscreen-apps--ud839)
+* [Udacity Android Basics: Networking](https://www.udacity.com/course/android-basics-networking--ud843)
+* [Udacity Android Basics: User Input](https://www.udacity.com/course/android-basics-user-input--ud836)
+* [Udacity Android Basics: User Interface](https://www.udacity.com/course/android-basics-user-interface--ud834)
 
 
 ### Angular