Code style fixes and nits on the HLE project (#355)

* Some style fixes and nits on ITimeZoneService

* Remove some unneeded usings

* Remove the Ryujinx.HLE.OsHle.Handles namespace

* Remove hbmenu automatic load on process exit

* Rename Ns to Device, rename Os to System, rename SystemState to State

* Move Exceptions and Utilities out of OsHle

* Rename OsHle to HOS

* Rename OsHle folder to HOS

* IManagerDisplayService and ISystemDisplayService style fixes

* BsdError shouldn't be public

* Add a empty new line before using static

* Remove unused file

* Some style fixes on NPDM

* Exit gracefully when the application is closed

* Code style fixes on IGeneralService

* Add 0x prefix on values printed as hex

* Small improvements on finalization code

* Move ProcessId and ThreadId out of AThreadState

* Rename VFs to FileSystem

* FsAccessHeader shouldn't be public. Also fix file names casing

* More case changes on NPDM

* Remove unused files

* Move using to the correct place on NPDM

* Use properties on KernelAccessControlMmio

* Address PR feedback

4 files changed, 94 insertions, 0 deletions

diff --git a/Ryujinx.HLE/HOS/Services/Apm/IManager.cs b/Ryujinx.HLE/HOS/Services/Apm/IManager.cs
new file mode 100644
index 00000000..50822def
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Apm/IManager.cs
@@ -0,0 +1,27 @@
+using Ryujinx.HLE.HOS.Ipc;
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    class IManager : IpcService
+    {
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        public IManager()
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                { 0, OpenSession }
+            };
+        }
+
+        public long OpenSession(ServiceCtx Context)
+        {
+            MakeObject(Context, new ISession());
+
+            return 0;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Apm/ISession.cs b/Ryujinx.HLE/HOS/Services/Apm/ISession.cs
new file mode 100644
index 00000000..739e264d
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Apm/ISession.cs
@@ -0,0 +1,41 @@
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.Logging;
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    class ISession : IpcService
+    {
+        private Dictionary<int, ServiceProcessRequest> m_Commands;
+
+        public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
+
+        public ISession()
+        {
+            m_Commands = new Dictionary<int, ServiceProcessRequest>()
+            {
+                { 0, SetPerformanceConfiguration },
+                { 1, GetPerformanceConfiguration }
+            };
+        }
+
+        public long SetPerformanceConfiguration(ServiceCtx Context)
+        {
+            PerformanceMode          PerfMode   = (PerformanceMode)Context.RequestData.ReadInt32();
+            PerformanceConfiguration PerfConfig = (PerformanceConfiguration)Context.RequestData.ReadInt32();
+
+            return 0;
+        }
+
+        public long GetPerformanceConfiguration(ServiceCtx Context)
+        {
+            PerformanceMode PerfMode = (PerformanceMode)Context.RequestData.ReadInt32();
+
+            Context.ResponseData.Write((uint)PerformanceConfiguration.PerformanceConfiguration1);
+
+            Context.Device.Log.PrintStub(LogClass.ServiceApm, "Stubbed.");
+
+            return 0;
+        }
+    }
+}
\ No newline at end of file
diff --git a/Ryujinx.HLE/HOS/Services/Apm/PerformanceConfiguration.cs b/Ryujinx.HLE/HOS/Services/Apm/PerformanceConfiguration.cs
new file mode 100644
index 00000000..b24adfb3
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Apm/PerformanceConfiguration.cs
@@ -0,0 +1,18 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    enum PerformanceConfiguration : uint
+    {
+        PerformanceConfiguration1  = 0x00010000,
+        PerformanceConfiguration2  = 0x00010001,
+        PerformanceConfiguration3  = 0x00010002,
+        PerformanceConfiguration4  = 0x00020000,
+        PerformanceConfiguration5  = 0x00020001,
+        PerformanceConfiguration6  = 0x00020002,
+        PerformanceConfiguration7  = 0x00020003,
+        PerformanceConfiguration8  = 0x00020004,
+        PerformanceConfiguration9  = 0x00020005,
+        PerformanceConfiguration10 = 0x00020006,
+        PerformanceConfiguration11 = 0x92220007,
+        PerformanceConfiguration12 = 0x92220008
+    }
+}
diff --git a/Ryujinx.HLE/HOS/Services/Apm/PerformanceMode.cs b/Ryujinx.HLE/HOS/Services/Apm/PerformanceMode.cs
new file mode 100644
index 00000000..c4ab3cf2
--- /dev/null
+++ b/Ryujinx.HLE/HOS/Services/Apm/PerformanceMode.cs
@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    enum PerformanceMode
+    {
+        Handheld = 0,
+        Docked   = 1
+    }
+}