Service: Remove unnecessary includes from service.h

This has a huge fallout in terms of needing to fix other files because
all service implementations included that file.

src/core/hle/service/service.h

@@ -8,17 +8,19 @@
 #include <string>
 #include <unordered_map>
 #include <boost/container/flat_map.hpp>
+#include "common/bit_field.h"
 #include "common/common_types.h"
-#include "core/hle/ipc.h"
-#include "core/hle/ipc_helpers.h"
-#include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/hle_ipc.h"
-#include "core/hle/result.h"
-#include "core/memory.h"
+#include "core/hle/kernel/kernel.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Namespace Service
 
+namespace Kernel {
+class ClientPort;
+class ServerSession;
+}
+
 namespace Service {
 
 static const int kMaxPortSize = 8; ///< Maximum size of a port name (8 characters)