feat(ui-react-native): Button variants

[joebuono]

Description of changes

• Add primary and secondary Button variants
• Refactor styles for RNA subcomponent screens
• Update tests and snapshots

Issue #, if available

Description of how you validated changes

Checklist

• PR description included
• yarn test passes
• Tests are updated

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3c87e53

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR