fix(auth, android): linkWithCredential will not attempt to upgrade from anon user (matches iOS)

[Albocal]

Description

When doing "linkWithCredential" in Android and the users exists, it makes relogin with this new user instead of launch exception:
Error: [auth/credential-already-in-use] This credential is already associated with a different user account.

Related issues

Release Summary

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 --> Only for Android
  • No

Test Plan

---

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Codecov Report

Merging #5694 (d045936) into master (5dde564) will increase coverage by 0.11%.
The diff coverage is 0.00%.

❗ Current head d045936 differs from pull request most recent head 56a9c41. Consider uploading reports for the commit 56a9c41 to get more accurate results

@@             Coverage Diff              @@
##             master    #5694      +/-   ##
============================================
+ Coverage     53.63%   53.73%   +0.11%     
  Complexity      632      632              
============================================
  Files           208      208              
  Lines         10085    10069      -16     
  Branches       1543     1542       -1     
============================================
+ Hits           5408     5410       +2     
+ Misses         4393     4375      -18     
  Partials        284      284              

[mikehardy]

Thanks for posting this! I went to the relevant PR #4487 and PR #4552 and per a comment there:

#4487 (comment)

the original author has actually disavowed this style as well, with an indication it was no longer working anyway, so this looks like a good PR. Shame the style doesn't work - it would be a nicer DX if it did work and we could do the same thing in iOS but it is best if the platforms are consistent, and if this isn't working it should be removed

Thanks for the PR!