feat: Token Sorting feature 🚧

[gambinish]

Description

TBD

Related issues

Fixes: https://consensyssoftware.atlassian.net/browse/MMASSETS-357

Manual testing steps

Go to Portfolio Screen
Sort should allow sorting by declining fiat balance, and alphabetic descending
Import button should function the same as the import token link in footer

Screenshots/Recordings

Screen.Recording.2024-10-03.at.10.37.36.PM.mov

Before

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]

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