title: Error "Dependent package with key emulator not found" while updating Android SDK and tools
body: <p>I tried to update my Android Studio and got this error. How can I fix this?</p>
  
  <p>I don't have much experience with Android studio and Android app development. </p>
  
  <p>I am using Android Studio 2.3 and Linux.</p>
  
  <p><img src="https://i.stack.imgur.com/gtvOh.png" alt="Screenshot"></p>