title: In AndroidManifest: Expecting android:screenOrientation="unspecified"
body: <p>Android Studio 3.6.</p>
  
  <p>I want my app to be always in <code>portrait</code> mode. So in my <code>AndroidMainfest.xml</code>:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;activity
     android:name=".activity.SplashActivity"
     android:screenOrientation="portrait"&gt;
     &lt;intent-filter&gt;
        &lt;action android:name="android.intent.action.MAIN" /&gt;
  
        &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
     &lt;/intent-filter&gt;
  &lt;/activity&gt;
  </code></pre>
  
  <p>I run the app and <code>SplashActivity</code> shows in <code>portrait</code> mode. Nice.
  But the editor shows the following error:</p>
  
  <pre class="lang-none prettyprint-override"><code>Expecting android:screenOrientation="unspecified"
  </code></pre>
  
  <p>Why?</p>