Add Android Succinctly book.

free-programming-books.md

@@ -600,6 +600,7 @@
 * [Google Android Developer Training](https://developer.android.com/training/index.html)
 * [Styling Android](http://www.stylingandroid.com/)
 * [TechnoTalkative Android](http://www.technotalkative.com/android/)
+* [Android Programming Succinctly, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/android) (PDF, Kindle) *(Just fill the fields with any values)*
 
 
 ###APL