Add LegacyProvider to read the old format (requires a provider Manager, to
resolve singletons' bases, to decide whether they are interface- or service-
based).
Replace registry-based reg2bin with provider-based reg2unoidl.
Change-Id: I5865e62308cc2d9c5439211ac803d84e93aab656
Move unoidl functionality into a module of its own, as a prerequisite to use it
in codemaker etc. (This is intended to ultimately remove modules store and
registry, modulo backwards compatibility constraints.)
Change-Id: If5274cbd3a595951e6cf7a9664bc542f01833f38
