Tabs, TabContent架构下实现沉浸式，设置设置 .expandSafeArea不生效

// entryAbiltity.ets  
let isLayoutFullScreen = true;  
windowClass.setWindowLayoutFullScreen(isLayoutFullScreen)  
  .then(() => {  
    console.info('Succeeded in setting the window layout to full-screen mode.');  
  })  
  .catch((err: BusinessError) => {  
    console.error('Failed to set the window layout to full-screen mode. Cause:' + JSON.stringify(err));  
  });

let type = window.AvoidAreaType.TYPE_NAVIGATION_INDICATOR; // 以导航条避让为例  
let avoidArea = windowClass.getWindowAvoidArea(type);  
// 此处获取的单位为px，需转为vp  
let bottomRectHeight = px2vp(avoidArea.bottomRect.height); // 获取到导航条区域的高度  
console.log("bottomRectHeight is " + bottomRectHeight);  
AppStorage.setOrCreate('bottomRectHeight', bottomRectHeight);