Part of: #91605

Use Case: Consistent Chip style for all Flutter Chip types when opting on Material3

When opting in on useMaterial3 in ThemeData the basic vanilla Chip does not get a Material 3 theme, as it was implemented via #107166. It retains the Material 2 style as shown below:

This is an oversight and creates an inconsistent Chip experience in Flutter when using Material 3. This finding was discussed here #107166 (comment).

Proposal

Reuse the already existing M3 Assist Chip style, called ActionChip in Flutter as default theme and style for vanilla Chip in Flutter when opting in on Material3. This default per suggestion by @darrenaustin here #107166 (comment).

Background

This proposal is added to have a dedicated issue for this issue, instead of only the above referenced discussion in PR #107166. Plus it is nice to be able to link a PR to an issue that can be closed when it is merged.