Revert "misc: chore: Remove redundant code"

This reverts commit 05a88ccc94.

src/Ryujinx.Memory/AddressSpaceManager.cs

@@ -1,6 +1,7 @@
 using Ryujinx.Memory.Range;
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Runtime.CompilerServices;
 
 namespace Ryujinx.Memory

src/Ryujinx.Memory/NativeMemoryManager.cs

@@ -19,7 +19,7 @@ namespace Ryujinx.Memory
             _length = length;
         }
 
-        public T* Pointer => _pointer;
+        public unsafe T* Pointer => _pointer;
 
         public int Length => _length;
 

src/Ryujinx.Memory/Tracking/RegionHandle.cs

@@ -60,8 +60,8 @@ namespace Ryujinx.Memory.Tracking
         private readonly MemoryTracking _tracking;
         private bool _disposed;
 
-        private int _checkCount;
-        private int _volatileCount;
+        private int _checkCount = 0;
+        private int _volatileCount = 0;
         private bool _volatile;
 
         internal MemoryPermission RequiredPermission