HarmonyOS接入Flutter产物后，HarmonyOS与flutter交互报错

需要修改JtgFlutterPage代码：

class ceFlutterEntry extends FlutterEntry {
  configureFlutterEngine(flutterEngine: FlutterEngine): void {
    super.configureFlutterEngine(flutterEngine);
    GeneratedPluginRegistrant.registerWith(flutterEngine);
    this.delegate?.addPlugin(new FlutterChannelPlugin());
  }
}

@Entry
@Component
struct JtgFlutterPage {
  private flutterEntry: ceFlutterEntry | null = null;
  private flutterView?: FlutterView
  private flutterPlugin?: FlutterChannelPlugin
  aboutToAppear() {
    Log.d(TAG, "aboutToAppear===");
    this.flutterEntry = new ceFlutterEntry(getContext(this), router.getParams() as Record<string, Object>)
    this.flutterEntry.aboutToAppear()
    this.flutterView = this.flutterEntry.getFlutterView()
    this.flutterView.addFirstFrameListener(this)
  }
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