* Revert "[H] Created a variant of InheritedWidget specifically for Listenables (#23393)"
This reverts commit 931328596ac48a848953f330a192fc33425a378a.
* Revert "Fix a race condition in vmservice_test.dart (#23529)"
This reverts commit 5e7b0a366b3fe55b99fa79461a94140c59ab3f07.
* Upgrade everything except matcher.
* Roll matcher (and test)
* Adjust tests that depend on flutter:test directly to depend on a shim
* Require use of package:test shim and remove other references to package:test
