feat: Add getPreferences hook

[hmalik88]

Description

Write a short description of the changes included in this pull request, also include relevant motivation and context. Have in mind the following questions:

1. What is the reason for the change? Add snap_getPreferences functionality.

Related issues

Fixes: MetaMask/snaps#3199

Manual testing steps

1. Install the preferences Snap
2. Click "submit"
3. See that all of the expected preferences are available

Screenshots/Recordings

After

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]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[hmalik88]

I have read the CLA Document and I hereby sign the CLA

[sonarqubecloud]

Quality Gate failed

Failed conditions
16.7% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[github-actions]

Bitrise

✅✅✅ pr_smoke_e2e_pipeline passed on Bitrise! ✅✅✅

Commit hash: 5cd73b5
Build link: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/f8c36bbc-23ba-42c3-b700-731097520e32

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

[Daniel-Cross]

Looks good