This reverts commit e274d310.

* Remove autoninja calls from the analyze script.

Calling autoninja from this script is preventing the roll of new depot
tools that requires autoninja to run from inside a goma context.

Bug: https://github.com/flutter/flutter/issues/84618

* Also remove gn commands.

* Comment the gn/ninja commands to build java tests.

* Remove the ninja command.

* Remove steps to build host_debug from tests.

* Assert folder exists.

* Remove outdated code.

* Fix path joining instructions.

Reland "Provide better messaging when user attempts to use non-secure http connection. (#26226)" (#26400)

This reverts commit c7ef259e as dart sdk with corresponding changes has landed in internal repo.

See https://github.com/flutter/flutter/issues/83286

Revert "Provide better messaging when user attempts to use non-secure http connection. (#26226)" (#26371)

This reverts commit d46b5b36 because it breaks g3 Fuchsia tests since g3 fuchsia doesn't have updated dart sdk.

* Provide better message when user attempts to use non-secure http connection.
Co-authored-by: NZachary Anderson <zanderso@users.noreply.github.com>

Group together externally-managed UIDartState.

It's a frequent pattern to enable access to shell resources from the
framework via UIDartState. These handles are passed through several
other objects, where they lay mostly dormant. This refactor just aims
to ease maintenance of this state.

UIDartState is essentially just an easy to extend bus for dropping
off the shell kids in UIDartState, with constructors/operators that
remove the need for providing a full initializer lists in unittests.

Add image generator protocol and priority registry.

The protocol supports multi-frame images as well as optional
subpixel/downsampled decoding.

In preparation for #25551, rename SessionConnection to
DefaultSessionConnection. The plan is to have SessionConnection be an
interface we can create a fake of for testing purposes.

Ensure that AutoIsolateShutdown drops its reference to the DartIsolate on the intended task runner (#25899)

This reverts commit 8c14250f.

Fix typo.

Switch to scenic allocator and Image3 API.
Co-authored-by: NDavid Reveman <reveman@google.com>

Account for https://flutter-review.googlesource.com/c/recipes/+/11700.