This reverts commit d056500b.

This reverts commit 31de052e.

This reverts commit e2490f29.

The first line of the documentation of equality functions listEquals, mapEquals, and setEquals claimed that they are deep equality functions. A later paragraph explained that they check for deep equality only if the elements, which are collections, implement the equality operator to do so. That is almost never the case.

The first line of the documentation was changed to element-by-element equality, and a reference was added to the DeepCollectionEquality class.

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

flutter/engine@3c93ad4...44ba0c7

2021-05-11 chris@bracken.jp Formatting cleanup for CONTRIBUTING.md
(flutter/engine#26080)
2021-05-11 chris@bracken.jp Add uwptool.exe (flutter/engine#26038)
2021-05-11 bkonyi@google.com Manual SDK roll for DevTools SDK
integration (flutter/engine#26075)
2021-05-11 skia-flutter-autoroll@skia.org Roll Skia from 96bc12d19b9e to
7c328b4b42c5 (5 revisions) (flutter/engine#26071)

2021-05-11 iska.kaushik@gmail.com Unique frame number for each frame
(flutter/engine#26021)

In https://github.com/flutter/engine/pull/26075 we rolled the Dart SDK
to the engine. This included updates to parameter names to Iterable.map
and Iterable.expand which triggers lints about renaming method
parameters in CachingIterable.map and CachingIterable.expand.

This reverts commit 35ad43f2.

This reverts commit c26ed03c.

* Migrate to ChannelBuffers.push

* Move TestDefaultBinaryMessenger to its own file

* Apply deprecations and fix usages