These widgets are missing from
https://github.com/flutter/flutter/pull/59364

With this change, developers can use clipBehavior for
https://github.com/flutter/flutter/issues/59424

Remove globals and testbed to simplify test cases, using the existing environment configuration. This is some pre-factoring work to make landing #63610 easier

This reverts commit c67eafa8.

* Add native stacktrace field for PlatformException

* Mute the readValue check for stacktrace.

* polish

* Add unit test and further polish

* Added more comments

* remove unnecessary import

* fill in stacktrace to JSONMethodCodec and fix tests

* fix style

* Fix format

* Remove unnecessary TODO since not all explicitly declared errors have stacktrace in it from native side.

* Handle case for exception without stacktrace on jsonMethodCodec

* Add more unit tests

* format test
Co-authored-by: Ben Li <libe@google.com>

Revert: Update prepare_package.dart to use the process_runner package instead having duplicate code. #62710 (#63608)

This reverts #62710, since it has a noSuchMethodError in some circumstances.

This isn't just a straight git revert, because I had to resolve the conflicts in the reverted pubspec.yaml files and re-run flutter update-packages --force-upgrade to make the checksums match.