title: Issues using AndroidX and React Native
body: <p>I've been trying to integrate AndroidX into my hybrid React Native project, and I've run into the issue that Jetifier doesn't run on "local" projects. This results in all of my React Native libraries still using the old support libraries. I've put the appropriate lines into my gradle.properties file:</p>
  
  <pre><code>android.useAndroidX=true
  android.enableJetifier=true
  </code></pre>
  
  <p>This works for any remote libraries, but React Native places all of it's libraries as local modules on disk.</p>
  
  <p>I've tried a lot of things, but so far my best solution is a post package-install script that basically manually replaces all of the packages and add/removes libraries to the various gradle scripts.</p>
  
  <p>This is a very manual process and not super sustainable. Is there a better way to handle this issue?</p>