* 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

* updating the documentation after integration_test migration

* fix typos

* address reviewer comments

* add link for build modes

* 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

* squashing the commits together

* directory rename, project rename. addressing reviewer comments

* update cirrus file

* change tool signature