title: Custom Android notification with RemoteView and actions
body: <p>I have an issue for display a notification with a <code>RemoteViews</code> and add an action on it with <code>addAction(R.drawable.ic_notification, "More", pendingIntent)</code></p>
  
  <p>This is the notification with the remoteViews without the <code>addAction</code> method</p>
  
  <p><a href="https://i.stack.imgur.com/HGe6X.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/HGe6X.png" alt="enter image description here"></a></p>
  
  <p>This is the notification with the addAction</p>
  
  <p><a href="https://i.stack.imgur.com/Q1YR8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Q1YR8.png" alt="enter image description here"></a></p>
  
  <p>As you can see the system don't display the RemoteViews and display only the action button</p>
  
  <p>This is the instanciation of the remoteViews</p>
  
  <pre><code>RemoteViews notificationLayout = new RemoteViews(getPackageName(), R.layout.notification_small);
  notificationLayout.setImageViewResource(R.id.notification_small_iv, R.drawable.logo);
  notificationLayout.setTextViewText(R.id.notification_small_title, remoteMessage.getData().get(TITLE));
  notificationLayout.setTextViewText(R.id.notification_small_subtitle, remoteMessage.getData().get(CONTENT));
  </code></pre>
  
  <p>And this is the notification builder where I set the configuration and add Action</p>
  
  <pre><code>Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
              .setSmallIcon(R.drawable.ic_notification)
              .setCustomContentView(notificationLayout)
              .setColor(getResources().getColor(R.color.nice_blue))
              .setPriority(NotificationCompat.PRIORITY_DEFAULT)
              .setContentIntent(pendingIntent)
              .setAutoCancel(true)
              .setLights(Color.BLUE, 1000, 1000)
              .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
              .setPriority(PRIORITY_MAX)
              .setDefaults(DEFAULT_ALL)
                .addAction( 0,"More", pendingIntent)
              .build();
  </code></pre>
  
  <p>This is how I create the pending Intent but I'm not sure is related</p>
  
  <pre><code>PendingIntent pendingIntent;
  Intent intent = new Intent(this, SplashActivity.class);
  pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
  </code></pre>
  
  <p>I'm pretty sure it's possible to have a custom view and a AddAction button because Slack have it on the Android application</p>