- removed command related classes and combined them into KMKeymasterApplet class
- removed context class as it is no longer  needed.
- changed the random number generation logic to use aes cbc with aes 128 bit key encryption as simulator does not support aes ecb and aes 256 bit key.
- changed exception throwing to use ISOException.throwit() to use runtime environment's instance.

Optimization changes

…er class

verifyAuthorization APIs