FlutterBoost中App不显示最近任务列表名称的问题

在flutter_boost中如果当前页面是flutter页面，应用切到后台不显示最近任务列表名称。如果当前页面是原生页面，应用切到后台就可以显示最近任务名称。

已在main.dart里面设置过title属性，尝试设置过onGenerateTitle 也无果

flutter_boost:
git:
url: 'https://github.com/alibaba/flutter_boost.git'
ref: 'v3.0-preview.18'

flutter_version:2.5.3.

Reproduce the behavior in flutter_boost with Flutter 2.5.3 and ref v3.0-preview.18, starting from the main.dart title and onGenerateTitle setup described in the report. Compare backgrounding a Flutter page with a native page, then trace the FlutterBoost integration involved; done means the recent-task list shows the app name for both page types.

Written by the indexing model from the issue text.