Revert "Printer: start work on proper crypto implementation"

This reverts commit 603fd12f1b6f655756bf4853b2af30adc1f337ff.
remove legacy AES code
remove ae_aes.cpp from compilation
switch to CRYPTO library for AES
initial implementation: use a stronger key for AES [en|de]cryption
fix printer bug: strncpy overwrote the salt used in key derivation