title: ActivityTestRule is not imported
body: <p>I have added below dependencies in gradle:</p>
  
  <p><a href="https://i.stack.imgur.com/ZP5Vd.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZP5Vd.png" alt="enter image description here"></a></p>
  
  <p>But still ActivityTestRule can not be imported, showing error
  <a href="https://i.stack.imgur.com/5I7xB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5I7xB.png" alt="enter image description here"></a></p>