This PR is to add 19 new `ColorScheme` roles following the Material Design 3 specs. This PR doesn't apply the new colors to `ThemeData`  or any widgets.

This PR is created to split the big change in #138521, once this is merged, another PR that contains the rest of the changes(apply new color roles to widgets and deprecate 3 more colors) will follow.

**Tone-based surface colors** (7 colors): 
* surfaceBright
* surfaceDim
* surfaceContainer
* surfaceContainerLowest
* surfaceContainerLow
* surfaceContainerHigh
* surfaceContainerHighest

**Accent color add-ons** (12 colors):
* primary/secondary/tertiary-Fixed
* primary/secondary/tertiary-FixedDim
* onPrimary/onSecondary/onTertiary-Fixed
* onPrimary/onSecondary/onTertiary-FixedVariant

Please checkout this [design doc](https://docs.google.com/document/d/1ODqivpM_6c490T4j5XIiWCDKo5YqHy78YEFqDm4S8h4/edit?usp=sharing) for more information:)