title: TelephonyManager.EXTRA_INCOMING_NUMBER always null on Android 9
body: <p>On Android 9 the call:</p>
  
  <pre><code>String incomingNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
  </code></pre>
  
  <p>Always return <code>null</code>, how can I fix this under <strong>Android 9</strong>? It works for my old releases.
  How can I get the incoming number of a call, these days?</p>