libSceWebmParserMdrw technical debt

Unidentified export wVIrSj9g--M is an import-resolution declaration that throws through NotImplemented_nid_no_patch. Its name, parameter list, return type and behavior are unverified; the parameterless declaration is not an ABI contract.
Older callable NIDs: 6 unidentified exports have unverified names, signatures and behavior. These are throwing import-resolution placeholders; no functionality is implemented. No matching NIDs were found in the later module inventory.