* Add Material 3 support for Slider - Part 2

* Kick tests

* Update drawing order to fix html renderer bug

* Update test

* Use `curly_braces_in_flow_control_structures` for `material`

* include test/material

* add back removed comments

* migrates lib/foundation and lib/widgets

* migrates lib/painting and lib/material

* migrates lib/cupertino, lib/gestures, lib/services, lib/semantics and lib/rendering

* fixes failing tests

* migrates test/

* improves hashing of lists

Use additionalActiveTrackHeight when painting the radius of RoundedRectSliderTrackShape's active track (#85697)

Update samples to use repo analysis options, Fix sample templates and a ton of analyzer issues (#77868)

* migrate material to nullsafety

* address review comments

* address review comments

* fix build

* Add punctuation for unterminated sentences in doc comments

* Addressing review nit

* Fix even more unresolved doc references in material

* ++

* ++

https://github.com/flutter/flutter/issues/31931