title: 'setConfigSettings(FirebaseRemoteConfigSettings!): Unit' is deprecated
body: <p>After upgrading Firebase libraries to </p>
  
  <pre><code>implementation "com.google.firebase:firebase-messaging:18.0.0"
  implementation 'com.google.firebase:firebase-config:17.0.0'
  implementation 'com.google.firebase:firebase-core:16.0.9'
  </code></pre>
  
  <p>and syncing Gradle, I got warning:</p>
  
  <pre><code>'setConfigSettings(FirebaseRemoteConfigSettings!): Unit' is deprecated. Deprecated in Java
  'setDeveloperModeEnabled(Boolean): FirebaseRemoteConfigSettings.Builder!' is deprecated. Deprecated in Java
  </code></pre>
  
  <p>in these lines:</p>
  
  <pre><code>//Setting Developer Mode enabled to fast retrieve the values
  firebaseRemoteConfig.setConfigSettings(
      FirebaseRemoteConfigSettings.Builder().setDeveloperModeEnabled(BuildConfig.DEBUG)
          .build())
  </code></pre>