Do not require file storage permissions at start in Chrome on browser platform

Chrome with browser platform is asking for user permission at cordova start, for example :


I don't want to store any file with cordova-plugin-file on browser platform so it should not asking for it (I think it should be asked only when needed).

It seems that the permission request come from this file : https://github.com/apache/cordova-plugin-file/blob/master/www/browser/Preparing.js
I could do a PR but I don't fully understand what is done here and why.

Start by reading www/browser/Preparing.js and tracing why Cordova startup requests file storage permission on Chrome with the browser platform. Compare that flow with the expectation that permission is requested only when file storage is used. Done means browser startup no longer asks for this permission when the plugin is unused, while file access still requests it when needed.

Written by the indexing model from the issue text.