As part of flutter/packages#3367
I found this documentation https://github.com/flutter/flutter/wiki/Plugin-Tests#enabling-android-ui-tests
Which told me to duplicate "Duplicate the DartIntegrationTests.java"
In my pr I added additional documentation to that file that gives some breadcrumbs and documents the responsibility of @DartIntegrationTest. https://github.com/flutter/packages/pull/3367/files#diff-e07edbc4dd4ffe102c4bdef3edb067570e8e742c6fbc9e4d90dc0c5b563d58f9

Modify all the other existing copy's of DartIntegrationTest.java to have the same documentation.

Feedback from chat: replace "flutter_plugin_tools" With "the repository tooling"