title: Android App closes on adding wrapper class to manifest
body: <p>App closes on adding wrapper class to manifest. On removal of the class it works perfectly fine.</p>
  
  <p>the class that needs to be added : </p>
  
  <pre><code>public class App extends Application {
  
      @Override
      public void onCreate() {
          super.onCreate();
  
          final FirebaseRemoteConfig remoteConfig = FirebaseRemoteConfig.getInstance();
          Map&lt;String,Object&gt; defaultValue = new HashMap&lt;&gt;();
          defaultValue.put(UpdateHelper.KEY_UPDATE_ENABLE,false);
          defaultValue.put(UpdateHelper.KEY_UPDATE_VERSION,"1.0");
          defaultValue.put(UpdateHelper.KEY_UPDATE_URL,"play url");
  
          remoteConfig.setDefaults(defaultValue);
          remoteConfig.fetch(5).addOnCompleteListener(new OnCompleteListener&lt;Void&gt;() {
              @Override
              public void onComplete(@NonNull Task&lt;Void&gt; task) {
                  if(task.isSuccessful()){
                      remoteConfig.activateFetched();
                  }
              }
          });
      }
  }
  </code></pre>
  
  <p>manifest :</p>
  
  <pre><code>&lt;application
          android:name="com.abc.App"
          android:allowBackup="true"
          android:icon="@drawable/logo"
          android:label="@string/app_name"
          android:roundIcon="@drawable/logo"
          android:supportsRtl="true"
          android:theme="@style/AppTheme"&gt;
  </code></pre>
  
  <p>stack trace :</p>
  
  <pre><code>java.lang.Class&lt;com.google.android.gms.internal.zzevx&gt;: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/internal/zzfhe;
  2019-04-26 08:35:28.661 9940-9940/com.abc I/art:     at com.google.firebase.remoteconfig.FirebaseRemoteConfig com.google.firebase.remoteconfig.FirebaseRemoteConfig.getInstance() ((null):-1)
  2019-04-26 08:35:28.661 9940-9940/com.abc I/art:     at void com.abc.App.onCreate() (App.java:18)
  </code></pre>
  
  <p>line 18 -> final FirebaseRemoteConfig remoteConfig = FirebaseRemoteConfig.getInstance();</p>