This converts the packages/flutter/test/services directory to NNBD, now that the services package is converted.
I changed the signature of checkMessageHandler and checkMockMessageHandler on BinaryMessenger to take a nullable handler, since the tests wanted to check to make sure a handler wasn't set, and that functionality no longer works if the handler is non-nullable.
* Update project.pbxproj files to say Flutter rather than Chromium
Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.
* Update the copyright notice checker to require a standard notice on all files
* Update copyrights on Dart files. (This was a mechanical commit.)
* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.
Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).
* Clean up the copyrights in non-Dart files. (Manual edits.)
Also, make sure templates don't have copyrights.
* Fix some more ORGANIZATIONNAMEs
* Add smoke test for the new Android embedding
* Update AndroidManifest.xml in app template
* Update test README.md
* Remove widget_test.dart
* Update pubspec.yaml
* Force GeneratedPluginRegistrant.java
This disables the Firebase Test Lab release smoke test, I think it's failing for reasons that probably don't have to do with the commit that started failing (which I think is dd51afd).
This is blocking autoroll of flutter/engine@b7b791b which fixes a TODAY bug: #36079
