feat: refactor engine helpers to handle push notifications - 2/3

[Jonathansoufer]

Description

This PR aims to be based on 12028, and brings some refactoring on Engine and hooks to handle push notifications and user storage retrieval. There's no UI change on this PR.

Related issues

Fixes:

Manual testing steps

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Screenshots/Recordings

Before

After

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• 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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[github-actions]

Bitrise

✅✅✅ pr_smoke_e2e_pipeline passed on Bitrise! ✅✅✅

Commit hash: a30efe4
Build link: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/6da37ea9-022b-4722-a5d1-846081bb3b6b

Note

• You can kick off another pr_smoke_e2e_pipeline on Bitrise by removing and re-applying the Run Smoke E2E label on the pull request

[github-actions]

Bitrise

✅✅✅ pr_smoke_e2e_pipeline passed on Bitrise! ✅✅✅

Commit hash: e4c6f45
Build link: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/94d5afd6-6dee-4011-bf7b-2d769024f7d0

Note

• You can kick off another pr_smoke_e2e_pipeline on Bitrise by removing and re-applying the Run Smoke E2E label on the pull request

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
75.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud