feat(auth, android): add forceRecaptchaFlowForTesting API

[billykwok]

Description

Add support for the Android-only forceRecaptchaFlowForTesting method.

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
• 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

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[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
react-native-firebase	❌ Failed (Inspect)			Jun 5, 2023 4:22pm

1 Ignored Deployment

Name	Status	Preview	Comments	Updated (UTC)
react-native-firebase-next	⬜️ Ignored (Inspect)			Jun 5, 2023 4:22pm

[CLAassistant]

All committers have signed the CLA.

[mikehardy]

Fantastic! This is a great change, and the attention to detail in the PR is excellent - much appreciated

[mikehardy]

there were some completely trivial lint-type errors exposed by CI once I approved the CI runs, I just pushed a commit that cleans them all up, so it's ✨ clean, should go green now, will merge assuming yes / will fixup a touch more until it is green otherwise

[mikehardy]

The vercel deployment failure is not reproduced on other branches, going to ignore that here for the sake of merge and cleanup post-merge if it fails to deploy