Directly specify keystore to prevent debug key signing flake in Deferred components integration test. (#89606)

This reverts commit 5cf62e84.

This reverts commit bf8e1270.

This fixes #71222

* Implement operator = and hashcode for CupertinoThemeData and CupertinoTextThemeData which CupertinoThemeData depends on.
* Add basic tests for CupertinoThemeData equality and hashcode.

I also manually tested the case mentioned in #71222, e.g. equality of ThemeData(cupertinoOverrideTheme: someTheme)
Co-authored-by: Jacob Simionato <jsimionato@google.com>

Switch to Debian bullseye, update nodejs to npm package, add flutter desktop run dependencies (#89309)

This change updates the Dockerfile for Cirrus builds:

- Switch to a newer stable Debian build (bullseye instead of stretch)
- Eliminates the very old (10) nodejs install in favor of the npm package
- Installs OpenJDK so that Android SDK manager can run on bullseye
- Installs the prerequisites for Linux desktop flutter run.

The motivation for this change was to include the dependencies for Linux desktop flutter run so that I can run tests that use desktop Flutter apps, but that needs cmake 3.10 or later, and stretch doesn't have a cmake that new. Of course, there's also no openjdk-8-jre for bullseye, so I used OpenJDK from JFrog instead.

[CheckboxListTile, SwitchListTile, RadioListTile] Adds visualDensity, focusNode and enableFeedback (#89353)

This PR adds visualDensity, focusNode and enableFeedback to:

- CheckboxListTile
- SwitchListTile
- RadioListTile

4159d7f0f Roll Skia from 10fa1c84b4b2 to ca5d31e4592c (14 revisions) (flutter/engine#28489) (#89623)

Simplifying and refactoring parts of RenderEditable. Functionality is the same.

0bd9be379 Roll Dart SDK from 238108dd9c6f to d6fa0d686082 (1 revision) (flutter/engine#28461) (#89470)

When we landed the CMake minimum requirement constraint for Visual
Studio 2019, we landed it with minimum version 3.15, since that's what
was shipping with the current version of VS 2019 at the time. Looking at
the release notes of earlier versions, it's clear that earlier versions
of Visual Studio 2019 shipped with version 3.14. See:
https://devblogs.microsoft.com/cppblog/visual-studio-cmake-support-clang-llvm-cmake-3-14-vcpkg-and-performance-improvements/

Looking at release notes for CMake 3.15, there are no features/fixes
introduced in that version that we are dependent on.
https://cmake.org/cmake/help/latest/release/3.15.html

Issue: https://github.com/flutter/flutter/issues/88589

3ef7126fd Roll Skia from 517f4ffb12ca to 678ec7187a33 (29 revisions) (flutter/engine#28451) (#89455)

* Update overscroll indicator for reverse

* Review feedback

* Review feedback

5aa0e4c77 Roll Dart SDK from 3e5ab8e22dc3 to 9ad577b3a3e4 (9 revisions) (flutter/engine#28448) (#89442)

* Update .gitignore.tmpl

* Add pubspec.lock

* Exclude example/pubspec.lock

* Address feedback