hle: Fix some inconsistencies in namespace naming in Services (#808)

Also fix IShopServiceAccessSystemInterface being in the wrong namespace.

Ryujinx.HLE/HOS/Services/Loader/IProcessManagerInterface.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Loader
+{
+    [Service("ldr:pm")]
+    class IProcessManagerInterface : IpcService
+    {
+        public IProcessManagerInterface(ServiceCtx context) { }
+    }
+}