HLE: Fix integer sign inconcistency accross the codebase (#2222)

* Make all title id instances unsigned

* Replace address and size with ulong instead of signed types

Long overdue change.
Also change some logics here and there to optimize with the new memory
manager.

* Address Ac_K's comments

* Remove uneeded cast all around

* Fixes some others misalignment

Ryujinx.HLE/HOS/Services/Spl/IRandomInterface.cs

@@ -21,7 +21,7 @@ namespace Ryujinx.HLE.HOS.Services.Spl
 
             _rng.GetBytes(randomBytes);
 
-            context.Memory.Write((ulong)context.Request.ReceiveBuff[0].Position, randomBytes);
+            context.Memory.Write(context.Request.ReceiveBuff[0].Position, randomBytes);
 
             return ResultCode.Success;
         }