Add EVP_EncryptInit_ex/EVP_EncryptFinish_ex, and the equivalently named

decrypt functions

Some functions including low level AES functions would be deprecated
in next OpenSSL version(3.0).
OpenSSL team says that application should use the high level EVP APIs,
so I added these functions.

See also:
https://github.com/openssl/openssl/pull/10580
https://github.com/openssl/openssl/pull/10740