title: import project from github into android studio says it's not gradle based project
body: <p>As the title says, I've imported a project I've been working on from github into android studio. It has build.gradle files, and settings.gradle. Why does it say it's not a gradle based file?</p>
  
  <p>Am I missing something that I needed to do when I pulled it from github? I just followed the android studio import from github option. What else do I have to do...?</p>
  
  <p>When I try to do a gradle sync, it tells me the project isn't gradle based.</p>