title: Android emulator - dummy emulator-5554 and AVD ... is already running
body: <p>I've been trying to run this down for two days now and I am absolutely stumped.
  Running on Windows 10.
  Project builds fine.
  I hit run, select Nexus 5x API 28 virtual device, the emulator boots, and the Nexus 5X runs without the app.</p>
  
  <p>Run 'app' again and now my deployment options are a dummy Emulator-5554[Offline] and the Nexus. Selecting the Nexus gets me the "AVD Nexus_5X_API_28 is already running. If this is not the case..." error.
  Selecting the unwelcomed Emulator-5554 returns an "error launching app" from Android Studio.</p>
  
  <p>So here's what I've tried:  </p>
  
  <ul>
  <li>Deleting the Nexus 5x files -- all of them.  </li>
  <li>Installing a Pixel 2 instead -- problem is the same.  </li>
  <li>Cold booting Nexus 5x -- no effect.  </li>
  <li>ADB kill-server.  </li>
  <li>ADB start-server.  </li>
  <li>Tracing 5554 to the <code>qemu-system-etc.exe</code> application and killing it.  </li>
  <li>Deleting <code>local/android/sdk</code>, and reinstalling Android Studio without saved settings.  </li>
  <li>Different phones and different APIs.  </li>
  <li>Switching on Developer Mode on the Nexus 5x.  </li>
  </ul>
  
  <p>The next step is formatting the hard drive and scorching the earth around it.  </p>
  
  <p>Has anyone seen this before?</p>
  
  <p>Edit: </p>
  
  <pre><code>adb -s emulator-5554 emu kill 
  </code></pre>
  
  <p>removes the emulator-5554  and closes android emulator. </p>