modify SymmetricEncrypt to inherits Encrypt for using Encrypt's function interface like recursive_encrypt/decrypt
modify SymmetricEncrypt to inherits Encrypt for using Encrypt's function interface like recursive_encrypt/decrypt

Signed-off-by: mgqa34 <873f6cae19e173e032060684f437bdb9a161fc74@163.com>

FederatedAI/FATE,FederatedAI/FATE,FederatedAI/FATE