This reverts commit 5257f029.

* Building shared C source code as part of the native build for platforms Android, iOS, Linux desktop, MacOS desktop, and Windows desktop.
* Sample code doing a synchronous FFI call.
* Sample code doing a long running synchronous FFI call on a helper isolate.
* Use of `package:ffigen` to generate the bindings.

Revert "[flutter_tools] [iOS] Change UIViewControllerBasedStatusBarAppearance to true to fix rotation status bar disappear in portrait" (#95747)

This reverts commit 6a3ea7eb.

This reverts commit bfe9c598.

This reverts commit 9038fac9.

This reverts commit 058dfd49.

[flutter_tools] [iOS] Change UIViewControllerBasedStatusBarAppearance to true to fix rotation status bar disappear in portrait (#92647)

This reverts commit 31e33647.

This change updates the platform runners in the benchmarks subdir.

I've attempted to replace the entire group with new code as if the project were recreated with flutter create so that they don't become a Frankenstein of minor changes to make it work again, but just plain old generated code that can be replaced and updated in place.

Also make the spelling ThemeMode consistent

This reverts commit 1d9edde0.

* Revert "Mark last failing test after gradle update as flaky. (#91423)"

This reverts commit 46a52d03.

* Revert "fix android template for Gradle 7 (#91411)"

This reverts commit 51d06d53.

* Revert "Add explicit version for mac and windows openjdk. (#91408)"

This reverts commit bf429f27.

* Revert "Update the openjdk version used by linux android tests. (#91405)"

This reverts commit 2144ab8b.

* Revert "Migrate to Gradle 7.0.2 / AGP 7.0.1 (#90642)"

This reverts commit b6459f9b.

The first of three or four changes to update the platform directories of the packages in the Flutter repo that have out date platform code.

This batch includes updating the flutter_view example, updating the sanity check numbers in analyze.dart, and adding some missing Podfiles in the examples. I also eliminated some trailing whitespace in the templates for Android.

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

* Update .gitignore.tmpl

* Add pubspec.lock

* Exclude example/pubspec.lock

* Address feedback