* 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
* Updated the audout:u and IAudioOut, now it might work with RetroArch without trigger an assert, however it's not the ideal implementation
* Updated the audout:u and IAudioOut, now it might work with RetroArch without trigger an assert, however it's not the ideal implementation
* audout:u OpenAudioOut implementation and IAudioOut cmd 1,2,3,4,5 implementation
* using an enum for audio_out_state as well as changing its initialize to member initializer list
* Minor fixes, added Service_Audio for LOG_*, changed PcmFormat enum to EnumClass
* Minor fixes, added Service_Audio for LOG_*, changed PcmFormat enum to EnumClass
* added missing Audio loggin subclass, minor fixes, clang comment breakline
* Solving backend logging conflict
* minor fix
* Fixed duplicated Service NVDRV in backend.cpp, my bad
* 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)