Add a test for the safe events serialization produced by RumViewScope in multi-threaded environment

[0xnm]

What does this PR do?

This test emulates updates for the RumViewScope in one thread and serialization of events produced in another thread. It shouldn't be any issues doing that.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

Merging #1933 (e11172e) into develop (684f5b4) will increase coverage by 0.06%.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1933      +/-   ##
===========================================
+ Coverage    83.31%   83.37%   +0.06%     
===========================================
  Files          481      481              
  Lines        17412    17407       -5     
  Branches      2588     2590       +2     
===========================================
+ Hits         14506    14513       +7     
+ Misses        2195     2190       -5     
+ Partials       711      704       -7     

Files	Coverage Δ
.../android/rum/internal/domain/scope/RumViewScope.kt	94.10% <100.00%> (+0.74%)	⬆️

... and 27 files with indirect coverage changes