title: Scanning for BLE devices on Android 8+ in the background
body: <p>I'm using the following method from BLE scanner API on Android 8+
  to scan for BLE Beacons </p>
  
  <pre><code>startScan(List&lt;ScanFilter&gt; filters, ScanSettings settings, 
  PendingIntent callbackIntent)
  </code></pre>
  
  <p>The problem is that after sometimes I can see Scan Logs but nothing is delivered by the <code>callbackIntent</code> any idea why is this happening?</p>