title: Plugin with id 'com.google.firebase.firebase-perf' not found
body: <p>In implementing the 'Performance' feature of Firebase, I got the following error attempting to sync the Gradle:</p>
  <pre><code>Plugin with id 'com.google.firebase.firebase-perf' not found.
  </code></pre>
  <p>I implemented it following instructions here:
  <a href="https://firebase.google.com/docs/perf-mon/get-started-android" rel="noreferrer">https://firebase.google.com/docs/perf-mon/get-started-android</a>. In particular it directs you to specify the classpath dependency to com.google.firebase:perf-plugin in your root-level (project-level) Gradle file, not he app-level:</p>
  <p><a href="https://i.stack.imgur.com/s69wT.png" rel="noreferrer"><img src="https://i.stack.imgur.com/s69wT.png" alt="enter image description here" /></a></p>
  <p>Here are my Gradles, app-level left, project-level right:</p>
  <p><a href="https://i.stack.imgur.com/6I9Jq.png" rel="noreferrer"><img src="https://i.stack.imgur.com/6I9Jq.png" alt="enter image description here" /></a></p>