Feat: 2.2 Oauth seedless onboarding UI flow

[ieow]

Description

1.9
Social Login OAuth flow using seedless onboarding (Toprf) following figma design below
https://www.figma.com/design/pViOUcmjwhEzFsdrwknpNc/Onboarding-redesign?node-id=434-55200&t=wmEoQSF9g9lFtkwp-0

This PR cover
Social Login OAuth flow using seedless onboarding (Toprf) for

• createNewAccount
• rehydrateAccount (recover)

Related issues

Fixes:

Manual testing steps

1. Go to this page...

Screenshots/Recordings

Before

After

Screen.Recording.2025-05-21.at.1.32.12.PM.mov

Screen.Recording.2025-05-21.at.12.42.49.PM.mov

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

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