We'd like to see how many of these flakes are transient and how many involve the device/machine getting temporarily wedged. Add a retry with no delay to see if it is possible to add sufficient error handling to startApp/installApp to handle this.

Date Picker jumps back to initialDatePickerMode after day selection.

Both start and stop app create an application package, but only start app used the application binary. Create the application package once and pass it to both start and stop app.

* Generate pubspec.yaml for synthetic package if it did not exist prior

* Revert "Revert "Improve performance of collectAllElements (#68065)" (#68207)"

This reverts commit 46ff57d6.

* use fewer elements for benchmark

[devicelab] allow the devicelab to take a screenshot if the iOS connection fails with FLUTTER_IOS_SCREENSHOT_ON_CONNECTION_FAILURE (#68156)

More attempts to remote diagnose the issues in the iOS devicelab

Migrate yet even more widget framework tests to null safety.

This reverts commit d962c8f2.

This crash affects anyone using flutter, so move it into the tool where it can be tested and documented. Ensure it works on windows devicelab too.