feat(material-experimental/theming): add mixin for customizing checkb…

[wagnermaciel]

…ox tokens

Example usage:

.html {
  @include mat.checkbox-overrides((
    selected-focus-state-layer-color: blue,
    selected-hover-state-layer-color: blue,
    selected-pressed-state-layer-color: blue,
  ));
}

Notes about the API:

• An error is thrown if a user passes in a token that does not exist in either the m2/mat or m2/mdc.
• Prefixes are determined automagically for the user based on whether the token exists in the m2/mat or m2/mdc tokens.

[LaySoe]

Thankfully service

[wagnermaciel]

@LaySoe The Angular team does not allow links to untrusted files

[andrewseguin]

LGTM - we could bikeshed the name "customizations" which I think is pretty lengthy, but I dont have a particularly strong opinion against it, or any radically better suggestions

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}