Optimized memory modified check (#538)

* Optimized memory modified check

This was initially in some cases more expensive than plainly sending the data. Now it should have way better performance.

* Small refactoring

* renamed InvalidAccessEventArgs
* Renamed PtPageBits

* Removed ValueRange(set)

They are currently unused and won't be likely to be used in the near future

Ryujinx.HLE/HOS/Kernel/KProcess.cs

@@ -995,7 +995,7 @@ namespace Ryujinx.HLE.HOS.Kernel
             }
         }
 
-        private void InvalidAccessHandler(object sender, InvalidAccessEventArgs e)
+        private void InvalidAccessHandler(object sender, MemoryAccessEventArgs e)
         {
             PrintCurrentThreadStackTrace();
         }