Fix FunkinSound not resuming after focus

`FunkingSound.onFocus` was checking `_shouldPlay` before resuming,
but this would always be false, causing the sound to not resume
when tabbing out and back into the game.

source/funkin/audio/FunkinSound.hx

@@ -186,7 +186,7 @@ class FunkinSound extends FlxSound implements ICloneable<FunkinSound>
    */
   override function onFocus():Void
   {
-    if (!_alreadyPaused && this._shouldPlay)
+    if (!_alreadyPaused)
     {
       resume();
     }