title: Android default screen orientation
body: <p>In my manifest file, I set </p>
  
  <pre><code>    android:screen orientation="portrait" 
  </code></pre>
  
  <p>for my MainActivity. I did this so that my initial tutorial can work well. After the initial tutorial has concluded, I now want my MainActivity to behave normally ie when the user rotates the device let it change by itself(the default behaviour). Is there a way to that</p>