Rewrite all UI tests with the Robot design pattern #401

[JanFidor]

All tests have been rewritten with robot design pattern with no changes to the inner logic of the test (the only exception being bookmarks feature -> feed_whenRemovingBookmark_removesBookmark() test. I believe that my change allows for more flexibility with testing multiple bookmark deletions)

[dturner]

Thanks for this PR. Please run

./gradlew --init-script gradle/init.gradle.kts spotlessApply

to fix formatting issues, and also resolve the merge conflicts.

[JanFidor]

Hi! Thanks for the quick script, it definitely saved me a lot of time. I'm terribly grateful for the opportunity to contribute here, unfortunately I might have gotten a little to enthusiastic about it and messed up git history a bit (sorry, I'll make sure not to do that next time) but everything's working and the gradle script throws up no errors.

[mmoczkowski]

Waiting for author to update PR

[JanFidor]

Just noticed the merge conflict, I'll resolve in 3h max

[JanFidor]

Resolved the merge conflict

[JanFidor]

CI checks seem to be failing due to com.google.samples.apps.nowinandroid.ui.NavigationTest -> navigationBar_reselectTab_keepsState test. I've tried a lot of things (including but not limited to clearing my gradle cache) but I can't reproduce it locally, more importantly, my PR didn't change that file, so the CI checks seem to be the problem, could you confirm @mmoczkowski ?