title: Can't run Android Studio's Emulator
body: <p>I guess it was because after run instrumented test file so become can't open Android Studio's emulator?
  But I am not sure.</p>
  <p>Error message:
  Launching 'app' on No Devices.
  Error while waiting for device: The emulator process for AVD Pixel_4_XL_API_30 was killed.</p>
  <p><a href="https://i.stack.imgur.com/oTLdn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/oTLdn.png" alt="enter image description here" /></a></p>