fix(player): 修复竖滑上一集不自动播放

test/playback/seek_progress_bar_test.dart

@@ -30,7 +30,7 @@ void main() {
       scrubPreviewLeft(trackWidth: 300, fraction: 1),
       300 - scrubPreviewWidth - scrubPreviewSafeMargin,
     );
-    expect(scrubPreviewLeft(trackWidth: 100, fraction: 0.5), 0);
+    expect(scrubPreviewLeft(trackWidth: 100, fraction: 0.5), 2);
   });
 
   testWidgets('should_show_inactive_track_when_video_is_not_initialized', (