title: "Task: react-native-admob: compileDebugJavaWithJavac FAILED" is displayed by react-native-admob
body: <p>I implemented a video ad using react-native-admob.
  When I built it this morning, the app that should have worked properly suddenly failed to build.</p>
  <pre><code>&gt; Task :react-native-admob:compileDebugJavaWithJavac FAILED
  
  Deprecated Gradle features were used in this build, making it incompatible with Gradle 6.0.
  Use '--warning-mode all' to show the individual deprecation warnings.
  See https://docs.gradle.org/5.5/userguide/command_line_interface.html#sec:command_line_warnings
  22 actionable tasks: 2 executed, 20 up-to-date
  /prj/node_modules/react-native-admob/android/src/main/java/com/sbugert/rnadmob/RNAdMobInterstitialAdModule.java:20: error: cannot find symbol.
  import com.google.android.gms.ads.InterstitialAd;
                                   ^
    symbol:   class InterstitialAd
    location: package com.google.android.gms.ads
  /prj/node_modules/react-native-admob/android/src/main/java/com/sbugert/rnadmob/RNAdMobInterstitialAdModule.java:36: error: cannot find symbol.
      InterstitialAd mInterstitialAd;
      ^
    symbol:   class InterstitialAd
    location: class RNAdMobInterstitialAdModule
  
  </code></pre>
  <p>The development environment is as follows.</p>
  <ul>
  <li>react：16.9.0</li>
  <li>react-native：0.61.5</li>
  <li>Gradle:3.5.4</li>
  <li>Android 10 emulator</li>
  <li>react-native-admob:2.0.0-beta.6</li>
  <li>Android Studio:4.1.1</li>
  </ul>
  <p>I have tried the following.</p>
  <ul>
  <li>Add the following to app / build.gradle</li>
  </ul>
  <pre><code>configurations.all {
      resolutionStrategy {
          force &quot;com.google.android.gms:play-services-basement:17.0.0&quot;
          force &quot;com.google.android.gms:play-services-base:17.1.0&quot;
          force &quot;com.google.android.gms:play-services-stats:17.0.0&quot;
          force &quot;com.google.android.gms:play-services-gcm:17.0.0&quot;
          force &quot;com.google.android.gms:play-services-ads:19.7.0&quot;
      }
  }
  </code></pre>
  <ul>
  <li>Change From com.google.android.gms:play-services-ads:19.1.0 to com.google.android.gms:play-services-ads:19.7.0</li>
  <li>Change from react-native-admob@2.0.0-beta.6 to react-native-admob@1.3.2</li>
  <li>gradlew cache clean</li>
  <li>node_modules delete and npm install</li>
  </ul>
  <p>Please let me know if there is a solution.</p>