[FIX]: Core - switch chain when chain isnt available in wallet already

[Adamj1232]

Description

There were missing imports and a null fallback that was missing to properly handle adding a new chain

Checklist

• Increment the version field in package.json of the package you have made changes in following semantic versioning and using alpha release tagging
• Check the box that allows repo maintainers to update this PR
• Test locally to make sure this feature/fix works
• Run yarn check-all to confirm there are not any associated errors
• Confirm this PR passes Circle CI checks
• Add or update relevant information in the documentation

[socket-security]

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[socket-security]

🚨 Potential security issues detected. Learn more about Socket for GitHub ↗︎

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Alert	Package	Note	Source	CI
Critical CVE	npm/[email protected]	CVE: GHSA-xwcq-pm8m-c4vf crypto-js PBKDF2 1,000 times weaker than specified in 1993 and 1.3M times weaker than current standard (CRITICAL) Affected versions: < 4.2.0 Patched version: 4.2.0	examples/with-nextjs-13/yarn.lock	⚠︎
Critical CVE	npm/[email protected]	CVE: GHSA-mpj8-q39x-wq5h crypto-es PBKDF2 1,000 times weaker than specified in 1993 and 1.3M times weaker than current standard (CRITICAL) Affected versions: < 2.1.0 Patched version: 2.1.0	examples/with-nextjs-13/yarn.lock	⚠︎

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Next steps

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