This reverts commit 3802eb62.

Fuchsia will soon remove all support for Component Framework version 1
components (recognized by component manifests ending in `.cmx`).
Notably, some of the `flutter` tool commands for Fuchsia devices--
notably, but not limited to, those related to CFv1--are outdated, and
either do not work today or soon won't work.

This PR removes the outdated components and commands, replacing some
with the newer version, or simply removing the non-working features,
in some cases.

Co-authored-by: Christopher Fujino <christopherfujino@gmail.com>

* Switch to use xml in PlistParser

* Review feedbacks: Change dynamic to Object, remove getValueFromFile

* Add DevTools version to `flutter --version` output.

* review comments

* fix test

* add explanatory comment

* dummy commit to kick bots
Co-authored-by: Christopher Fujino <christopherfujino@gmail.com>

[flutter_tools] replace MockFlutterVersion usage with fake where possible, move from context (#77390)

This reverts commit 547ed88a.

* opt out the flutter tool

* oops EOF

* fix import

* Update tool_backend.dart

* Update daemon_client.dart

* fix more