title: How to log or print in Android Instrumental Test
body: <p>In Android app, we could log out using </p>
  
  <pre><code>Log.d(TAG, message)
  </code></pre>
  
  <p>In the unit test, we could log out using</p>
  
  <pre><code>print(message)
  </code></pre>
  
  <p>What about in Instrumental Test? (I tried <code>Log</code> and <code>print</code>, doesn't work)?</p>