kernel: Move object class to its own source files

General moving to keep kernel object types separate from the direct
kernel code. Also essentially a preliminary cleanup before eliminating
global kernel state in the kernel code.

src/core/hle/service/service.h

@@ -10,11 +10,10 @@
 #include <string>
 #include <unordered_map>
 #include <boost/container/flat_map.hpp>
-#include "common/bit_field.h"
 #include "common/common_types.h"
 #include "core/hle/kernel/hle_ipc.h"
-#include "core/hle/kernel/kernel.h"
 #include "core/hle/service/sm/sm.h"
+#include "core/hle/kernel/object.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Namespace Service

src/core/hle/service/sm/sm.h

@@ -4,9 +4,11 @@
 
 #pragma once
 
+#include <memory>
 #include <string>
 #include <unordered_map>
-#include "core/hle/kernel/kernel.h"
+
+#include "core/hle/kernel/object.h"
 #include "core/hle/result.h"
 #include "core/hle/service/service.h"