audio/am: Improve audio effect versioning

Signed-off-by: Collecting <collecting@noreply.localhost>

src/audio_core/renderer/effect/effect_info_base.h

@@ -1,4 +1,5 @@
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 citron Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
@@ -207,6 +208,8 @@ public:
         return state.data();
     }
 
+    size_t GetParameterSize() const { return parameter.size(); }
+
     /**
      * Set this effect's usage state.
      *