title: How to send to "Miscellaneous" notification channel?
body: <p><del><h2> Problem description </h2>
  When I try to send a <code>Notification</code> in <strong>Android O</strong> I have to specify a <code>NotificationChannel</code> to send to.</p>
  
  <p>If I use the old method (not setting up any channel) like this <code>NotificationCompat.Builder(this)</code>, the <code>Notification</code> will not be displayed.</p>
  
  <p>The same is for an invalid channel like this <code>NotificationCompat.Builder(this, "invalid")</code> or <code>NotificationCompat.Builder(this, "")</code>.</p>
  
  <p>When I send a notification through <strong>Firebase Cloud Messaging</strong> and have my application in the background with no <em>notification channel</em> specified, it will be a notification in the <strong>"Miscellaneous"</strong> channel.</p>
  
  <p>When I try to do the same in the foreground above mentioned will not work and neither will creating a notification channel with the name <em>"Miscellaneous"</em> and id <em>"{package}.MISCELLANEOUS"</em> and then sending through it. When I do that what happens is the following:</p>
  
  <p><a href="https://i.stack.imgur.com/2rZTp.png" rel="noreferrer"><img src="https://i.stack.imgur.com/2rZTp.png" alt="Screenshot from my app&#39;s settings"></a></p>
  
  <h2> What I want to know </h2>
  
  <p>How do I send a notification without a channel like <strong>FCM</strong> does it, so it lands in the regular <strong>"Miscellaneous"</strong> channel?</p>
  
  <h2> Examples of this working </h2>
  
  <p>As I mentioned above, it happens with the <em>FCM notifications</em>, but e.g. <strong>Gmail</strong> also uses the miscellaneous channel. <strong>So how do I use it?</strong></p>
  
  <p><a href="https://i.stack.imgur.com/1E1nM.png" rel="noreferrer"><img src="https://i.stack.imgur.com/1E1nM.png" alt="Screenshot of Gmail&#39;s notification channels"></a></p>
  
  <p>I believe that they would have removed the miscellaneous channel if it is normally unusable.</p>
  
  <p></del></p>
  
  <h2> Shorter description </h2>
  
  <p>Why is this code not sending a notification to the "Miscellaneous" notification channel, it is in fact not sending any notification (only on Android O, the code works on lower Android versions).</p>
  
  <pre><code>(getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager).notify(1, NotificationCompat.Builder(this, NotificationChannel.DEFAULT_CHANNEL_ID)
                      .setSmallIcon(R.drawable.small_icon)
                      .setContentTitle(URLDecoder.decode("Title", "UTF-8"))
                      .setContentText(URLDecoder.decode("Text", "UTF-8"))
                      .setColor(ContextCompat.getColor(applicationContext, R.color.color))
                      .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
                      .setContentIntent(PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT))
                      .build())
  </code></pre>