* enabling firefox screenshot tests. adding to documentation
* test with correct goldens
* update goldens SHA
* change the goldens with flutter/goldens repo
* do not run preparation step twice. this will cause test_results to be deleted
* carrying code
* more changes for carrying the code
* rebase changes onto ios-screenshot tests
* adding screenshot capability to text_editing e2e test
* address some comments
* change enable flag for isUnitTestsScreenshotsAvailable
* addressing the reviewer comments
* change the dependency for path
* add to licencense file
* changing goldens commit no. the new commit has the screenshot goldens
* update readme file
* firefox tests needs LUCI changes
* change to release mode since screenshots were taken in release mode
* change window size
* some argument changes
* small comment change
* test the chrome linux tests again
* use roboto font instead of default font
* addressing reviewer comments
* change commit for goldens
* changing the integration tests to show errors. The drive file is reduced to nothing now
* adding more to readme
* rebase to master and removing unused import
* changing readme
* Switch ui.window.devicePixelRatio to browser dpi
* Add integration test for multi res image loading
* Update cirrus for new integration test
* update canvas golden test root transform
* Update compositing golden test with dpr transform
