Remove 1745 decorative breaks

Cleanup M3 token templates for theme lookups

Update Material tokens to 0.162

* Update to v0.158 of the token database.

* Update checkbox template

* Fix DatePickerTheme test

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Co-authored-by: Qun Cheng <quncheng@google.com>

* dart fix --apply

* manual fixes

* Updated to tokens v0.150.

* Updated with a reverted list_tile.dart.

- Added complete support for showCheckmark to ChipThemeData.
- Removed build method checks for ThemeData.chipTheme, as that is
  already handled by ChipTheme.of().

* 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

This reverts commit 988959da.

This reverts commit 5fd259be.