There are two unfixed problems with the automatic plugin registration:

• Possible engine bug when running Android background execution Android. NoSuchMethodError (NoSuchMethodError: No top-level getter '_registerPlugins' declared. #77680
• Regression in ability to remove dart packages that transitively depend on package with plugin registration

Since this isn't quite ready for the next release, we should back out the change for now and re-land afterwards. Specifically:

• Implement dartPluginClass support for plugins #74469
• Call Dart plugin registrant if available engine#23813