fix(auth): missing PhoneMultiFactorGenerator export

[DoctorJohn]

Description

This PR fixes that the PhoneMultiFactorGenerator class was not properly exported via the modular API.

Related issues

• follows what has been done in fix(auth): Fix auth type definitions and add more #8323 for other types
• I noticed the missing export while working on docs(auth): update examples to use modular API #8327

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
  • Other (macOS, web)
• My change includes tests;
  • e2e tests added or updated in packages/\*\*/e2e
  • jest tests added or updated in packages/\*\*/__tests__
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

Test Plan

I updated the auth package's jest tests and verified they pass/fail with/without the relevant code changes.

🔥

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Name	Status	Preview	Comments	Updated (UTC)
react-native-firebase	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 1, 2025 5:51pm

[mikehardy]

Gah 🤦 - thanks @DoctorJohn