title: What is the cordova_plugins.json file for? Cordova is requesting it at initialization
body: <p>I am trying to debug what the cordova_plugins.json file is used for?</p>
  
  <p>I am using multiple plugins so far and I have never interacted with this file. I want to figure out why cordova makes an xhr request for this file at initialization.</p>
  
  <p>When looking at my console I keep seeing this 404 error every time I test my app in Chrome and like to understand why this file is necessary.</p>