[MWCore] Update refresh token to avoid reuse of stale refresh token

[LZRS]

Stale refresh token on expiry leads to requests raising 401 and sync failing

IMPORTANT: Where possible all PRs must be linked to a Github issue

Fixes #2958

Engineer Checklist

• I have written Unit tests for any new feature(s) and edge cases for bug fixes
• I have added any strings visible on UI components to the strings.xml file
• I have updated the CHANGELOG.md file for any notable changes to the codebase
• I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the project's style guide
• I have built and run the FHIRCore app to verify my change fixes the issue and/or does not break the app
• I have checked that this PR does NOT introduce breaking changes that require an update to Content and/or Configs? If it does add a sample here or a link to exactly what changes need to be made to the content.

Code Reviewer Checklist

• I have verified Unit tests have been written for any new feature(s) and edge cases
• I have verified any strings visible on UI components are in the strings.xml file
• I have verifed the CHANGELOG.md file has any notable changes to the codebase
• I have verified the solution has been implemented in a configurable and generic way for reuseable components
• I have built and run the FHIRCore app to verify the change fixes the issue and/or does not break the app

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ba88193) 68.3% compared to head (f0ac79c) 68.3%.

Additional details and impacted files

@@             Coverage Diff              @@
##             mwcore-dev   #2959   +/-   ##
============================================
  Coverage          68.3%   68.3%           
  Complexity          901     901           
============================================
  Files               164     164           
  Lines              7345    7346    +1     
  Branches           1037    1037           
============================================
+ Hits               5020    5021    +1     
  Misses             1667    1667           
  Partials            658     658           

Flag	Coverage Δ
engine	68.3% <100.0%> (+<0.1%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
...ister/fhircore/engine/auth/AccountAuthenticator.kt	73.9% <100.0%> (ø)
...re/engine/data/remote/shared/TokenAuthenticator.kt	77.5% <100.0%> (+0.1%)	⬆️