[WIP] np: Stub functionality for Simulated NP

[InvoxiPlayGames]

With the network mode set to "Simulated" for a game, almost any attempt to actually use NP functions results in the emulator throwing an exception from the game thread since RPCN tries to be accessed. Since if a game thinks it's connected it's probably going to use NP features, the game should at the very least not crash and be fed dummy data.

Since a full implementation would be a larger undertaking and might need codebase changes, I'm sending in as a draft for opinions on how it should be implemented. Currently it's just checking if the current PSN status isn't RPCN and then returning a fake response in the np_handler functions.

PR status: sceNpBasicGetBlockListEntryCount, sceNpBasicGetFriendListEntryCount and sceNpManagerRequestTicket2 no longer crash the guest (required for BLES01222), other functions (creating lobbies etc) probably do.

[kd-11]

This looks like a textbook case for polymorphism.
Instead of mixing the code we should juat create a separate class with stubs for the implementation and register that instead.

[digant73]

maybe this PR, if a dummy implementation will avoid the emulator throwing an exception, can be properly implemented by one of the main developers (e.g. galciv if I'm not wrong)?