forked from github/cordova-android

This includes the following changes: - move this developer-only script to test/ where it conceptually belongs - this also prevents it from being distributed with this package - fix paths for `android` and `androidx` variants - make paths relative to the script, not to CWD - use `removeSync` instead of `existsSync` and `existsSync` - rename npm script to `clean:java-unit-tests` to clarify scope