Adds a test that invokes flutter run in release mode on macOS desktop,
waits for successful launch and the flutter command list, then sends the
'q' command to quit the running app.

This adds an integration test for https://github.com/flutter/flutter/pull/100504.

Issue: https://github.com/flutter/flutter/issues/100348 (fix)
Issue: https://github.com/flutter/flutter/issues/97978 (partial fix)
Issue: https://github.com/flutter/flutter/issues/97977 (partial fix)
Umbrella issue: https://github.com/flutter/flutter/issues/60113

This reverts commit a7c85996.

Add a benchmark for simple DisplayLists to exercise the Raster Cache's cache admission algorithm (#97992)

(Attempt to reland #85993)

This reverts commit 2175e64e.

Migrate core devicelab framework to null safety.

Fixes an incorrect cast that caused a build failure.

Landing on red to fix the build.

This adds avoid_dynamic_calls to the list of lints, and fixes all instances where it was violated.

Importantly, this lint is NOT turned on for flutter/packages/test, because those changes are happening in another PR: #84478

* pub global deactivate devtools before installing
* upgrade devtools to latest

This reverts commit 99a947c3.

This reverts commit 714dea5e.