* 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

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.

This reverts commit 8ba5732c.

These androidx migration tests require downloading firebase, which is a large library with a number of dependencies - this causes frequent enough flakes.

AndroidX migration is ~2 years in the past, and while it would be nice to confirm this still works, ideally that would be done in a reduced manner.

- run_without_leak_tests: have been disabled for months
- build_benchmark: the tooling work here is mostly done and we're not tracking further improvements, free up more devicelab capacity
- system_debug_ios: does not work post iOS13
- mac_enable_twc: not adding more mac tests to devicelab
- hello_world_start_up: disabled

Any tests that we think will be valuable in the future can be resurrected from the git history.

--use-application-binary allows running with an already built APK. This can be useful for speeding up CI test cases, or in our case eventually supporting some sort of build server. Demonstrate that this works by updating the old gallery test to use it. Fixes #56604
Co-authored-by: Jenn Magder <magder@google.com>

A change which sped up hot restart locally caused many of the devicelab measures to regress. I think this is because we do not measure when the isolate is actually "ready", so starting a reload or restart prematurely can cause time spent doing initialization to be registered as part of the reload operation.

A fix for this would be to have the framework include some sort of "initialization complete" event ... but it is not clear what the correct trigger would be. Perhaps after the first frame is successfully registered?

(9a3a0dc1 caused the benchmark regression - possibly since we spend less time syncing files now so we start the restart earlier)

This reverts commit b33bfcef.

This reverts commit 3eb2335a.

Now that fast-start syncs assets by default, this isn't testing anything. Retire the test

* adding tests that uses integration_test (e2e) package to flutter

* change the package name for the import

* fix licenses. fix README commands. add links

* adding dependency change auto generated by the tool

* more analyzer error fixes

Fixes https://github.com/flutter/flutter/issues/66569

The previously broken test should be fixed by
https://github.com/flutter/gallery/pull/331

This reverts commit 2d9e5005.

In addition, this fixes broken Android tests of the original PR.

This reverts commit 2ae09caa.

This shouldn't break our tests as
https://github.com/flutter/gallery/issues/275 is closed.