feat: Implement max amount with gas station fallback

[OGPoyraz]

Explanation

TBD

References

• Fixes: Enable gasless mUSD conversions for max amount transactions metamask-mobile#25466

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