* ldn: Implement calls of UserLocalCommunicationService
- Implement `IUserServiceCreator: CreateUserLocalCommunicationService` according to RE.
- Implement `IUserLocalCommunicationService` calls:
- Every calls in this interface are layered to `NetworkInterface`.
- `GetState` according to RE.
- `InitializeOld`, `Initialize` and `Finalize` stubbed with the appropriate result code and some TODO according to RE.
- `AttachStateChangeEvent` according to RE.
* Fix var name and TODO comments
* Fix review
* 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
