All of the talks from Devoxx 2013 are now freely available on the parleys.com website. This includes all of the talks that I did with Romain Guy on Android:
Filthy Rich [Android] Clients
What's New in Android
Android Performance Workshop Part 1
Android Performance Workshop Part 2
There's also an interview about the new features in KitKat.
Then there's this somewhat less relevant Patterns, Shmatterns talk I did about software design patterns.
All of the slides from the Android talks are posted on Romain's blog.