Add all services to the Service namespace

Previously there was a split where some of the services were in the
Service namespace and others were not.

src/core/hle/service/srv.h

@@ -4,20 +4,19 @@
 
 #include "core/hle/service/service.h"
 
-////////////////////////////////////////////////////////////////////////////////////////////////////
-// Namespace SRV
-
+namespace Service {
 namespace SRV {
 
 /// Interface to "srv:" service
-class Interface : public Service::Interface {
+class SRV final : public Interface {
 public:
-    Interface();
-    ~Interface() override;
+    SRV();
+    ~SRV() override;
 
     std::string GetPortName() const override {
         return "srv:";
     }
 };
 
-} // namespace
+} // namespace SRV
+} // namespace Service