libSceAudioSystem technical debt

sceAudioSystemInit, sceAudioSystemProcessAdd, sceAudioSystemProcessRemove, sceAudioSystemProcessResume, sceAudioSystemProcessSuspend, sceAudioSystemTerminate have unknown signatures and behaviour. The parameterless int declarations are import-resolution placeholders, not confirmed ABI signatures, and throw through NotImplemented_nid_no_patch. Only the names and NIDs are established by the 13.60 export inventory.
sceAudioSystemSystemResume and sceAudioSystemSystemSuspend (libSceAudioSystem) - names and NIDs are present in the PS5 3.20 export inventory, but no credible prototypes were found. The declarations have no parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified