* Add unknown function at the number command 2
* correct audout:u commands numbers
* correct audrec:u cmd number & add Unknown function
* correct IAudioDevice command numbers
* correct codecctl cmd numbers & rename the 8 function
* correct place of unknown function & fix clang-format
* stubs for audout:u, audin:u, audrec:u, audren:u, codecctl and decoding tables with nullptr for future implementations
* fixing the changes requested (remove private, explicit)