This reverts commit 6a7f231d.

Use "product" mode VM snapshot when running dynamic "release" mode flutter with cached engine. (#22043)

Dynamic "release" mode requires "product" (not "release") mode VM, so we must point it to the correct cached snapshot.

Generation and caching of this snapshot happens the following corresponding change: https://chromium-review.googlesource.com/c/chromium/tools/build/+/1232134

* enable lint unnecessary_new

* fix tests

* fix tests

* fix tests

* Revert "iOS Dialog blur, brightness, and layout (#18381)"

This reverts commit 21bc9f1b.

* Revert "Flutter tool support for dynamic code. (#20543)"

This reverts commit 25ba90aa.

It was causing problems rolling Flutter into Fuchsia

* re-enable lint unnecessary_const

* remove trailling whitespaces

* remove unnecessary const (after merge)

This reverts commit cc1cf13e.

This updates AppContext per the recommendations in #15352

Fixes #15352

* Pass entry points JSON files to front-end server (#15180)

* Fix ios/debug build which uses 'flutter build aot': do not require entry points files and disable AOT transformations in this mode

* Revert "Pass entry points JSON files to front-end server (#15180)"

This reverts commit 0edea887.

Reason: buildbot failures on Mac.

* Add to Artifacts, and add optional arguments to entry points for flut… (#15185)

Add to Artifacts, and add optional arguments to entry points for flutter run and test to allow for wiring up the same with preview-dart-2 internally

* Changing packages uri here is not necessary

This reverts commit e0f6e626.

Add to Artifacts, and add optional arguments to entry points for flutter run and test to allow for wiring up the same with preview-dart-2 internally

This is needed to support running with local engine's dart sdk.

This is follow-up to https://github.com/flutter/flutter/pull/14702.

* Use already downloaded dart sdk for frontend_server.

This is follow-up to https://github.com/flutter/flutter/pull/14610

* Remove reference to engine dart-sdk from artifacts

* Remove unused imports

* WIP to switch back to solution where dart sdk is downloaded into bin/cache/dart-sdk, but it is 'flutter precache -a' that can download all dart sdks for other platforms under bin/cache/artifacts/engine/<platform>/dart-sdk

* Download all dart sdks when 'flutter precache -a'

* Plumb a --strong option through to the front end server and the engine
so that we can run flutter apps in preview-dart-2 and strong mode

* - Address analyzer lint issues
*- correctly set up strong mode option in the case of AOT builds

Executables have '.exe' extension on Windows. We do have to specify extension for gen_snapshot since when running with local engine, we are looking for that exact file before launching it.