Added missing recordingActive parameter to dart side of plugin (bluefireteam#870)

Co-authored-by: Tomasz Marzeion <tmarzeion@sii.pl>

Author: tmarzeion

packages/audioplayers/lib/src/audioplayer.dart

@@ -345,13 +345,15 @@ class AudioPlayer {
     String url, {
     bool? isLocal,
     bool respectSilence = false,
+    bool recordingActive = false,
   }) {
     return _invokeMethod(
       'setUrl',
       <String, dynamic>{
         'url': url,
         'isLocal': isLocal ?? isLocalUrl(url),
         'respectSilence': respectSilence,
+        'recordingActive': recordingActive,
       },
     );
   }