[WIP] Add support for events (#60)

* Add support for events, move concept of domains to IpcService

* Support waiting for KThread, remove some test code, other tweaks

* Use move handle on NIFM since I can't test that now, it's better to leave it how it was

Ryujinx.Core/OsHle/Services/Am/FocusState.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.Core.OsHle.IpcServices.Am
+{
+    enum FocusState
+    {
+        InFocus    = 1,
+        OutOfFocus = 2
+    }
+}