HarmonyOS 订阅键盘展开收起事件没有触发回调

在模拟器中，订阅键盘展开收起事件没有触发回调。

最小复现代码：

@Component
export struct KeyBoardEventTest {
  @State message: string = 'Hello World';
  aboutToAppear(): void {
    try {
      inputMethodEngine.getInputMethodAbility().on('keyboardShow', () => {
        console.log('InputMethodAbility keyboardShow.');
      });
      inputMethodEngine.getInputMethodAbility().on('keyboardHide', () => {
        console.log('InputMethodAbility keyboardHide.');
      });
    } catch(err) {
      console.error(`InputMethodAbility Failed to keyboard: ${JSON.stringify(err)}`);
    }
  }
  build() {
    Row() {
      Column() {
        TextInput({ text: this.message, placeholder: 'input your word...' })
      }
      .width('100%')
    }
    .height('100%')
  }
}