title: startScan() in WifiManager deprecated in Android P
body: <p>How to get scan result from wifi for example every 3 seconds, without <code>mWifimanager.startScan();</code></p>
  
  <p>Google says : </p>
  
  <p><code>startScan()
  This method was deprecated in API level P. The ability for apps to trigger scan requests will be removed in a future release.</code></p>
  
  <p>Notice for this API level i'm using 
  <code>List&lt;ScanResult&gt; results = mWifiManager.getScanResults();</code> without calling <code>startScan</code> , the list contains the wifi AP's but it makes updated very very slow</p>
  
  <p>Update to 12 January 2019 : <a href="https://issuetracker.google.com/issues/112688545" rel="noreferrer">https://issuetracker.google.com/issues/112688545</a></p>