title: Banner ads not showing in Android emulator
body: <p>I have this code for testing bannerads in the Android emulator. I have the proper imports in place. Calling <code>this.showBannerAd()</code> stops the emulator from launching the app. Any inputs on the same would help.</p>
  
  <p>Constructor code:</p>
  
  <pre><code>constructor(  platform: Platform, 
                private admobFree: AdMobFree,              
  
              ) {
                  if (!platform.is('core')) {
                    this.showBannerAd();
                }
              }
   async showBannerAd(){
      const bannerConfig: AdMobFreeBannerConfig = {
        isTesting: true,
        autoShow: true
      }
       this.admobFree.banner.config(bannerConfig);
  
      try {
        const result = this.admobFree.banner.prepare();
        console.log("Admob result: ", result)
  
      }
  
      catch(e) {
        console.error(e);
      }
    }
  </code></pre>