我的代码的问题是，它不检测正在安装在Android上的应用程序，它总是返回false.我下面的官方文档从这里（https://ionicframework.com/docs/native/app-availability）这里是我的代码：

import { AppAvailability } from '@awesome-cordova-plugins/app-availability/ngx';
import { Platform } from 'ionic-angular';
    
app:any;
    
       constructor(
            private appAvailability: AppAvailability, 
            private platform: Platform
        ) { 
          this.app = 'com.twitter.android';
          this.platform.ready().then(() => {
          this.appAvailability.check(this.app)
          .then(
            (yes: boolean) => console.log(this.app + ' is available'),
            (no: boolean) => console.log(this.app + ' is NOT available')
          );
        }
        }

并且输出始终为：

com.twitter.android is NOT available

请告诉我这有什么问题？谢谢