title: Cannot get custom notification icon to work with FCM and Android
body: <p>Here is my res folder</p>
  
  <pre><code>.
  ├── drawable
  │   └── launch_background.xml
  ├── drawable-hdpi
  │   └── ic_stat_ic_notification.png
  ├── drawable-mdpi
  │   └── ic_stat_ic_notification.png
  ├── drawable-xhdpi
  │   └── ic_stat_ic_notification.png
  ├── drawable-xxhdpi
  │   └── ic_stat_ic_notification.png
  ├── drawable-xxxhdpi
  │   └── ic_stat_ic_notification.png
  ├── mipmap-hdpi
  │   └── ic_launcher.png
  ├── mipmap-mdpi
  │   └── ic_launcher.png
  ├── mipmap-xhdpi
  │   └── ic_launcher.png
  ├── mipmap-xxhdpi
  │   └── ic_launcher.png
  ├── mipmap-xxxhdpi
  │   └── ic_launcher.png
  └── values
      └── styles.xml
  </code></pre>
  
  <p>Here is my AndroidManifest.xml line</p>
  
  <pre><code>&lt;meta-data
    android:name="com.google.firebase.messaging.default_notification_icon"
    android:resource="@drawable/ic_stat_ic_notification" /&gt;
  </code></pre>
  
  <p>Here is what my notification icon looks like on 5.1.1</p>
  
  <pre><code>full color launcher icon in a gray circle
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/tqWaj.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tqWaj.png" alt="full color launcher icon in a gray circle"></a></p>
  
  <p>Here is what it looks like on a newer version of Android</p>
  
  <pre><code>a gray outline of the launcher icon, squircle
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/Fak7v.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Fak7v.jpg" alt="a gray outline of the launcher icon, squircle"></a></p>
  
  <p>Here is my xxxhdpi notification icon</p>
  
  <pre><code>a white on transparent png of a bell
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/ijNPy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ijNPy.png" alt="a white on transparent png of a bell"></a></p>
  
  <p>No matter what I try, I cannot get Android to show the silhouette notification icon that I attempt to provide. I am at a loss.</p>