Haydn: Part 1 (#2007)

* Haydn: Part 1

Based on my reverse of audio 11.0.0.

As always, core implementation under LGPLv3 for the same reasons as for Amadeus.

This place the bases of a more flexible audio system while making audout & audin accurate.

This have the following improvements:
- Complete reimplementation of audout and audin.
- Audin currently only have a dummy backend.
- Dramatically reduce CPU usage by up to 50% in common cases (SoundIO and OpenAL).
- Audio Renderer now can output to 5.1 devices when supported.
- Audio Renderer init its backend on demand instead of keeping two up all the time.
- All backends implementation are now in their own project.
- Ryujinx.Audio.Renderer was renamed Ryujinx.Audio and was refactored because of this.

As a note, games having issues with OpenAL haven't improved and will not
because of OpenAL design (stopping when buffers finish playing causing
possible audio "pops" when buffers are very small).

* Update for latest hexkyz's edits on Switchbrew

* audren: Rollback channel configuration changes

* Address gdkchan's comments

* Fix typo in OpenAL backend driver

* Address last comments

* Fix a nit

* Address gdkchan's comments

Ryujinx.Audio.Backends.SoundIo/Native/libsoundio/SoundIOChannelId.cs

@@ -0,0 +1,75 @@
+namespace SoundIOSharp
+{
+    public enum SoundIOChannelId
+    {
+        Invalid,
+        FrontLeft,
+        FrontRight,
+        FrontCenter,
+        Lfe,
+        BackLeft,
+        BackRight,
+        FrontLeftCenter,
+        FrontRightCenter,
+        BackCenter,
+        SideLeft,
+        SideRight,
+        TopCenter,
+        TopFrontLeft,
+        TopFrontCenter,
+        TopFrontRight,
+        TopBackLeft,
+        TopBackCenter,
+        TopBackRight,
+        BackLeftCenter,
+        BackRightCenter,
+        FrontLeftWide,
+        FrontRightWide,
+        FrontLeftHigh,
+        FrontCenterHigh,
+        FrontRightHigh,
+        TopFrontLeftCenter,
+        TopFrontRightCenter,
+        TopSideLeft,
+        TopSideRight,
+        LeftLfe,
+        RightLfe,
+        Lfe2,
+        BottomCenter,
+        BottomLeftCenter,
+        BottomRightCenter,
+        MsMid,
+        MsSide,
+        AmbisonicW,
+        AmbisonicX,
+        AmbisonicY,
+        AmbisonicZ,
+        XyX,
+        XyY,
+        HeadphonesLeft,
+        HeadphonesRight,
+        ClickTrack,
+        ForeignLanguage,
+        HearingImpaired,
+        Narration,
+        Haptic,
+        DialogCentricMix,
+        Aux,
+        Aux0,
+        Aux1,
+        Aux2,
+        Aux3,
+        Aux4,
+        Aux5,
+        Aux6,
+        Aux7,
+        Aux8,
+        Aux9,
+        Aux10,
+        Aux11,
+        Aux12,
+        Aux13,
+        Aux14,
+        Aux15
+    }
+}