* friend: Implement GetPlayHistoryRegistrationKey
This implement IServiceCreator::GetPlayHistoryRegistrationKey call accordingly to RE.
Close#1110
* Fix comments
* Fix guid and comment some codes
* Improve guid casting and remove unused vars
* Refactoring HOS folder structure
Refactoring HOS folder structure:
- Added some subfolders when needed (Following structure decided in private).
- Added some `Types` folders when needed.
- Little cleanup here and there.
- Add services placeholders for every HOS services (close#766 and #753).
* Remove Types namespaces