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/SoundIOFormat.cs

@@ -0,0 +1,25 @@
+namespace SoundIOSharp
+{
+    public enum SoundIOFormat
+	{
+		Invalid,
+		S8,
+		U8,
+		S16LE,
+		S16BE,
+		U16LE,
+		U16BE,
+		S24LE,
+		S24BE,
+		U24LE,
+		U24BE,
+		S32LE,
+		S32BE,
+		U32LE,
+		U32BE,
+		Float32LE,
+		Float32BE,
+		Float64LE,
+		Float64BE
+	}
+}