I believe mobile security is also part of android development. If so, does this book address also the security aspects in Android development? Also does the Android platform provide
out of the box security, something akin to javax.crypto packages?
No--we don't have a separate section for security, and we only touch in if it's an intrinsic part of the topic, e.g. SQL. But it is a very important topic. For things like javax.crypto you would be better to look at more general purpose Java security books. For broader details on security, any of the books by Bruce Schneier are an excellent primer.