libSceWebRtc technical debt

Callable exports - 5 entries are import-resolution declarations only. Parameter lists, return types and behavior are unverified; parameterless int declarations are placeholders, not verified ABI contracts. Every entry throws through NotImplemented_nid_no_patch. Unidentified names use literal NID aliases. No runtime functionality is implemented. Data exports require separate layout and ownership analysis. Candidate names match their NIDs in the public symbol database or supplemental catalog.