title: AAPT: error: attribute android:forceDarkAllowed not found
body: <p>Im trying to use android dark theme. I install android studio 3.5 preview. </p>
  
  <p>compileSdkVersion 28
   targetSdkVersion 28</p>
  
  <p>but still getting this error. Is this dark theme bug or Im doing something wrong?</p>
  
  <pre><code>build.gradle{
  dependencies {
      // ...
      implementation 'com.google.android.material:material:1.1.0-alpha06'
      // ...
    }}
  </code></pre>
  
  <p>styles.xml</p>
  
  <pre><code>&lt;style name="Theme.MyApp" parent="Theme.MaterialComponents.DayNight"&gt;
      &lt;item name="android:forceDarkAllowed"&gt;true&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>project link</p>
  
  <p><a href="https://github.com/googlesamples/android-DarkTheme" rel="noreferrer">https://github.com/googlesamples/android-DarkTheme</a></p>