title: FirebaseAdmin Messaging IOS issue
body: <p>I'm having different environments: development and demo.</p>
  <p>While sending push notifications using FirebaseAdmin library on development environment, the notification goes on both environments for IOS and for Android goes on the right environment.</p>
  <p>The environment on Android is identified by PackageName and for IOS it is identified by BundleId.</p>
  <p>The message configuration is as follows:</p>
  <pre><code>message.Topic = notificationMessageTopic;
  message.Android = new AndroidConfig()
  {
      RestrictedPackageName = _options.Value.Android.PackageName
  };
  
  message.Apns.Headers = new Dictionary&lt;string, string&gt;()
  {
      { &quot;apns-topic&quot;, _options.Value.Ios.BundleId }
  };
  </code></pre>
  <p>Are there any problems here?</p>