fix(analytics): Set start time before generating session ID

[mattcreaser]

• PR title and description conform to Pull Request guidelines.

Issue #, if available:
#2746

Description of changes:
startTime should be set before generating a session ID

How did you test these changes?
(Please add a line here how the changes were tested)

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests
• Added Integration Tests
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.92%. Comparing base (6413dbc) to head (51f3b62).

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2747      +/-   ##
==========================================
- Coverage   42.93%   42.92%   -0.01%     
==========================================
  Files         905      905              
  Lines       29127    29127              
  Branches     4144     4144              
==========================================
- Hits        12505    12504       -1     
- Misses      15267    15269       +2     
+ Partials     1355     1354       -1