feat(client-utils): add shared mobile activity types

[n3ps]

Explanation

Mobile still extends ActivityKind and ActivityItem locally for staking, prediction, and perps activity. This adds those remaining variants to @metamask/client-utils so Mobile can remove its temporary type shim.

References

• Related to refactor(activity): migration cleanup metamask-mobile#35059

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

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