[MWCore] Update to engine sdk v1.0.0-preview15-SNAPSHOT

[LZRS]

while to maintaining hapi fhir version at v6.0.1

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

Fixes [link to issue]

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

Merging #2863 (7999138) into mwcore-dev (b717981) will decrease coverage by 0.1%.
The diff coverage is 100.0%.

Additional details and impacted files

@@              Coverage Diff               @@
##             mwcore-dev   #2863     +/-   ##
==============================================
- Coverage          68.3%   68.2%   -0.1%     
+ Complexity          901     895      -6     
==============================================
  Files               164     164             
  Lines              7338    7325     -13     
  Branches           1037    1033      -4     
==============================================
- Hits               5013    5000     -13     
- Misses             1667    1668      +1     
+ Partials            658     657      -1     

Flag	Coverage Δ
engine	68.2% <100.0%> (-0.1%)	⬇️

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

Files	Coverage Δ
...rtregister/fhircore/engine/sync/SyncBroadcaster.kt	86.8% <ø> (+1.4%)	⬆️
...hircore/engine/ui/register/BaseRegisterActivity.kt	69.0% <100.0%> (-1.3%)	⬇️

[LZRS]

Relates to #2825