switches pause mechanic for stop on stream

lib/streaming_audio_business_object.dart

@@ -45,8 +45,8 @@ class StreamingAudioBusinessObject extends ChangeNotifier {
     await _player.play();
   }
 
-  Future<void> pause() async {
-    await _player.pause();
+  Future<void> stop() async {
+    await _player.stop();
   }
 
   @override