Add Keymaster 0.4 binder API

This adds the classes for creating and serializing arguments and results
from keymaster as well as the enum values from
hardware/libhardware/include/hardware/keymaster_defs.h which will be
needed for argument creation as well as converting keymaster error
codes into Java exceptions.

Change-Id: I61046756361d43d9f02eea370c2cbd07c3638ea3