Fix audio only working after opening settings

[Dryxio]

Summary

Fix an issue where GTA radio/SFX audio can be muted after startup and only start working after opening the Settings menu.

Radio and SFX volumes are now restored from the persisted radiovolume / sfxvolume values when applying game settings.

Motivation

fix no audio

Test plan

To trigger the bug currently it's simple: set your master volume to 10% and keep radio and sfx to 100%
restart game
join a server: no sound (radio/sfx)
open settings once -> sound now works

Checklist

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