Add disable scale to replay button

[mchowning]

Description

Disables scaling to large font sizes on the replay button so that it is consistent with the rest of the story view. Follow-up on changes in #619. If this was intended behavior, please just close this PR. I just figured it would be quicker to put up a PR in case we do want that change. cc: @adamzelinski

Note
This PR is targeting release/7.21.1, but I also think it would be fine to delay this to the next release since this is a minor issue.

Testing Instructions

1. Set device font size to a large setting
2. View EOY epilogue Story
3. ✅ Observer that the replay button has a consistent size with the rest of the text

Screenshots or Screencast

Before	After

Checklist

• If this is a user-facing change, I have added an entry in CHANGELOG.md
• I have considered whether it makes sense to add tests for my changes
• All strings that need to be localized are in modules/services/localization/src/main/res/values/strings.xml
• Any jetpack compose components I added or changed are covered by compose previews

I have tested any UI changes...

• with different themes
• with a landscape orientation
• with the device set to have a large display and font size
• for accessibility with TalkBack

[ashiagr]

Thank you! LGTM.