title: Error type 3 Error: Activity class {} does not exist
body: <p>I have an IntelliJ Android project, that I successfully imported to Android Studio 0.4.0. It works perfectly if I don't change anything in manifest. However, when I want to change the launcher activity and run, it fails with this error:</p>
  
  <pre><code>Launching application: com.trackingeng/LandingActivity.
  DEVICE SHELL COMMAND: am start -D -n "com.trackingeng/LandingActivity"  
      -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
  Starting: Intent { act=android.intent.action.MAIN  
      cat=[android.intent.category.LAUNCHER] cmp=com.trackingeng/LandingActivity }
  Error type 3
  Error: Activity class {com.trackingeng/LandingActivity} does not exist.
  </code></pre>
  
  <p>When I click <strong>Sync Project with Gradle files</strong>, it outputs:</p>
  
  <pre><code>Project Sync
  The project 'TrackingEng' is not a Gradle-based project
  </code></pre>
  
  <p>Run settings:
  <img src="https://i.stack.imgur.com/mbMmP.jpg" alt="enter image description here"></p>