Add Cloud Vision Partial Veneer (#873)

* Initial partial veneer work

* Update with image helper

* Add detection methods and unit tests

* Update snippets and add snippet tests

* Update Vision methods and helpers

* Fix formatting and test references

* Fix snippets

* Add description to VisionHelpersTrait

* Address PR comments

* Address PR comments

* Address more PR feedback

* Fix lint error

* Remove line

* Fix test data provider