chore: handle the case of empty identifier

[Shahroz16]

closes: MBL-738: Android - Handle device registration when switching from profile with empty string/null identifier.

handles the case, where if profile attributes are added before the identifying the profile, userId was set to empty string.

[github-actions]

Sample app builds 📱

Below you will find the list of the latest versions of the sample apps. It's recommended to always download the latest builds of the sample apps to accurately test the pull request.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.91%. Comparing base (8b30804) to head (8176723).
Report is 25 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #476      +/-   ##
============================================
+ Coverage     41.98%   51.91%   +9.93%     
- Complexity      259      294      +35     
============================================
  Files            99       96       -3     
  Lines          2320     2585     +265     
  Branches        344      356      +12     
============================================
+ Hits            974     1342     +368     
+ Misses         1247     1134     -113     
- Partials         99      109      +10     

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[github-actions]

• java_layout: mbl-738-empty-identifier (1734265703)

[github-actions]

Build available to test
Version: mbl-738-empty-identifier-SNAPSHOT
Repository: https://s01.oss.sonatype.org/content/repositories/snapshots/

[github-actions]

📏 SDK Binary Size Comparison Report

No changes detected in SDK binary size ✅

[github-actions]

• kotlin_compose: mbl-738-empty-identifier (1734265709)