title: Error building Qt app for Android with Qt Creator
body: <p>When I tried to build QtFireExample with my QtCreator, failed with below error message.</p>
  
  <blockquote>
    <p>The installed SDK tools version (26.1.1) does not include Gradle
    scripts. The minimum Qt version required for Gradle build to work is
    5.9.0/5.6.3 Error while building/deploying project QtFirebaseExample (kit: Android) When executing step "Build Android APK"</p>
  </blockquote>
  
  <p>My android studio is 3.2.1.  And SDK tools 26.1 is also installed.<br>
  qt version is also above 5.9.0<br>
  What I did mistake?</p>
  
  <pre><code>❯ qmake --version
  QMake version 3.1
  Using Qt version 5.12.0 in /usr/local/Cellar/qt/5.12.0/lib
  </code></pre>