gitadora: arena cab volume change prevention (#478)

## Link to GitHub Issue, if one exists
#477 

## Description of change
Arena cab has two sound cards and it uses `WrappedIMMDeviceCollection`
to set the volume to 100% on boot on both, instead of the typical
`GetDefaultAudioEndpoint`.

## Testing
Testing Delta, testing other games as well as they are affected.

src/spice2x/games/gitadora/gitadora.cpp

@@ -3,6 +3,7 @@
 #include "bi2x_hook.h"
 #include <unordered_map>
 #include "cfg/configurator.h"
+#include "hooks/audio/mme.h"
 #include "hooks/graphics/graphics.h"
 #include "util/cpuutils.h"
 #include "util/detour.h"
@@ -236,6 +237,9 @@ namespace games::gitadora {
 
             // test/service/coin buttons
             bi2x_hook_init();
+
+            // volume change prevention
+            hooks::audio::mme::init(avs::game::DLL_INSTANCE);
             return;
         }