Implement mii:u and mii:e entirely (#955)

* Implement mii:u and mii:e entirely

Co-authored-by: AcK77 <Acoustik666@gmail.com>

This commit implement the mii service accurately.

This is based on Ac_k work but was polished and updated to 7.x.

Please note that the following calls are partially implemented:

- Convert: Used to convert from old console format (Wii/Wii U/3ds)
- Import and Export: this is shouldn't be accesible in production mode.

* Remove some debug leftovers

* Make it possible to load an arbitrary mii database from a Switch

* Address gdk's comments

* Reduce visibility of all the Mii code

* Address Ac_K's comments

* Remove the StructLayout of DatabaseSessionMetadata

* Add a missing line return in DatabaseSessionMetadata

* Misc fixes and style changes

* Fix some issues from last commit

* Fix database server metadata UpdateCounter in MarkDirty (Thanks Moose for the catch)

* MountCounter should only be incremented when no error is reported

* Fix FixDatabase

Co-authored-by: Alex Barney <thealexbarney@gmail.com>

Ryujinx.HLE/HOS/Horizon.cs

@@ -14,6 +14,7 @@ using Ryujinx.HLE.HOS.Kernel.Common;
 using Ryujinx.HLE.HOS.Kernel.Memory;
 using Ryujinx.HLE.HOS.Kernel.Process;
 using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Mii;
 using Ryujinx.HLE.HOS.Services.Pcv.Bpc;
 using Ryujinx.HLE.HOS.Services.Settings;
 using Ryujinx.HLE.HOS.Services.Sm;
@@ -232,6 +233,8 @@ namespace Ryujinx.HLE.HOS
             // FIXME: TimeZone shoud be init here but it's actually done in ContentManager
 
             TimeServiceManager.Instance.SetupEphemeralNetworkSystemClock();
+
+            DatabaseImpl.Instance.InitializeDatabase(device);
         }
 
         public void LoadCart(string exeFsDir, string romFsFile = null)