Thread scheduler rewrite (#393)

* Started to rewrite the thread scheduler

* Add a single core-like scheduling mode, enabled by default

* Clear exclusive monitor on context switch

* Add SetThreadActivity, misc fixes

* Implement WaitForAddress and SignalToAddress svcs, misc fixes

* Misc fixes (on SetActivity and Arbiter), other tweaks

* Rebased

* Add missing null check

* Rename multicore key on config, fix UpdatePriorityInheritance

* Make scheduling data MLQs private

* nit: Ordering

Ryujinx.HLE/HOS/Services/Aud/AudioOut/IAudioOut.cs

@@ -155,8 +155,6 @@ namespace Ryujinx.HLE.HOS.Services.Aud.AudioOut
             if (Disposing)
             {
                 AudioOut.CloseTrack(Track);
-
-                ReleaseEvent.Dispose();
             }
         }
     }