feat: add screen view event after session start

[zhu-xiaowei]

Description

1. add screen view event after session start

General Checklist

• Added new tests to cover change, if needed
• Build succeeds using Swift Package Manager
• All unit tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• If breaking change, documentation/changelog update with migration instructions

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 95.66%. Comparing base (3f3239b) to head (7cf5820).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #53      +/-   ##
==========================================
+ Coverage   95.59%   95.66%   +0.07%     
==========================================
  Files          35       35              
  Lines        1973     1986      +13     
==========================================
+ Hits         1886     1900      +14     
+ Misses         87       86       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.