[DAP] Add a custom event to pass flutter.serviceExtensionStateChanged…

[DanTup]

This exposes a custom event (flutter.serviceExtensionStateChanged) through DAP. This allows an editor to know when service extension state is changing (would could be as a result of another editor, or a DevTools instance changing it).

VS Code uses this to know know things like whether the app is in "select widget mode" so it can provide the correct toggle command.

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the Flutter Style Guide, including Features we expect every widget to implement.
• I signed the CLA.
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is test-exempt.
• All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel on Discord.

[christopherfujino]

LGTM.

[fluttergithubbot]

This pull request is not suitable for automatic merging in its current state.

• This commit is not mergeable and has conflicts. Please rebase your PR and fix all the conflicts.

[skia-gold]

Gold has detected about 1 new digest(s) on patchset 1.
View them at https://flutter-gold.skia.org/cl/github/93870

[flutter-dashboard]

Golden file changes have been found for this pull request. Click here to view and triage (e.g. because this is an intentional change).

If you are still iterating on this change and are not ready to resolve the images on the Flutter Gold dashboard, consider marking this PR as a draft pull request above. You will still be able to view image results on the dashboard, commenting will be silenced, and the check will not try to resolve itself until marked ready for review.

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Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

Changes reported for pull request #93870 at sha 8571500713d71fcc9a32eff851d7f02443f9551f

[DanTup]

@christopherfujino I'm not sure how to interpret the above. It looks like the golden for material.input_decorator.outline_label.rtl mismatched, but I don't expect this change to alter any rendering at all.

[christopherfujino]

@DanTup Looks like this was "fixed" upstream in #93925. I'm pretty sure rebasing past that will fix it.

[DanTup]

Ah, got it - I've rebased. I'm not sure if I need to remove the will-affect-goldens tag though - feel free to remove if it it shouldn't be on here (and the bot won't fix it). Thanks!

[fluttergithubbot]

This pull request is not suitable for automatic merging in its current state.

• The status or check suite Linux android views has failed. Please fix the issues identified (or deflake) before re-applying this label.

[DanTup]

I think this failure is unrelated too.

https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8830048478477663297/+/u/Android_Views_Integration_Tests/stdout

Downloading linux-x64/linux-x64-flutter-gtk tools...             1,732ms
Downloading linux-x64-profile/linux-x64-flutter-gtk tools...        667ms
Downloading linux-x64-release/linux-x64-flutter-gtk tools...        456ms
Running "flutter pub get" in android_views...                       3.1s
No Linux desktop project configured. See https://flutter.dev/desktop#add-desktop-support-to-an-existing-flutter-app to learn about adding Linux support to a project.

[christopherfujino]

I think this failure is unrelated too.

https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8830048478477663297/+/u/Android_Views_Integration_Tests/stdout

Downloading linux-x64/linux-x64-flutter-gtk tools...             1,732ms
Downloading linux-x64-profile/linux-x64-flutter-gtk tools...        667ms
Downloading linux-x64-release/linux-x64-flutter-gtk tools...        456ms
Running "flutter pub get" in android_views...                       3.1s
No Linux desktop project configured. See https://flutter.dev/desktop#add-desktop-support-to-an-existing-flutter-app to learn about adding Linux support to a project.

😅

[DanTup]

Rebasing again seems to have resolved that one :-) Hoping this will land once "Google testing" completes (which has been going a while, but I don't know how long it normally takes)