Change Xcode project developmentRegion to 'en' and plist CFBundleDevelopmentRegion to DEVELOPMENT_LANGUAGE (#34293)

Revert "fix devicelab manfiest (#33698)"

This reverts commit 5a6a00dc.
This reverts commit 0d79f0fc.

This relands flutter/flutter#33163 with a fix to the integration_ui test.

This reverts commit 52ae9968.

* Clean up some flutter_tools tests

* Remove arbitrary retry that happens even for fundamental errors, and generally clean up _DevFSHttpWriter.

* Update dependencies (requires fixes; see next commit)

* Fixes for new dependencies.

This is a re-land of #31561, after fixing performance regressions.

Added change listening to the MouseTracker so that the Listener and tooltip can react to whether or not a mouse is connected at all. Added a change check to make sure Listener only repaints when something changed.

Fixes #22817

* Update packages
* Capture JSON RPC errors that presently get swallowed

* Run non-perf sensisitive tests on Cirrus

* Wrap test.main with a custom processor
* Report test results to bigquery table

* add trailing commas on list/map/parameters

* add trailing commas on Invocation with nb of arg>1

* add commas for widget containing widgets

* add trailing commas if instantiation contains trailing comma

* revert bad change

* Update packages

* Change test for isFile

This reverts commit 30f33d6c.

Fixes https://github.com/flutter/flutter/issues/26544

* move flutter_assets to App.framework

* Roll engine to 05fee4eeee0ff6b219b1fcc394371e5f6963cc46

05fee4eee Update default flutter_assets path for iOS embedding (flutter/engine#7518)
02205db01 Roll src/third_party/skia 5d052dac3ac1..02738a86e5fd (4 commits) (flutter/engine#7541)
af907c074 Roll src/third_party/skia 5c7a3ac0e214..5d052dac3ac1 (7 commits) (flutter/engine#7540)
dde286673 IWYU to get SkFontMetrics (flutter/engine#7539)

* Rev Android Platform to 28 for bots

* push all to 28

* include platform tools update

This reverts commit d8db70af.