RUM-7590 Correct the way we register the initial resources for TTNS metric

[mariusc83]

What does this PR do?

We need to fix the way we are recording the initial resources needed for the TTNS metric computation by only doing this in the onSuccess callbacks once the resource event was persisted for upload. There are 2 special cases where the resource is stopped due to errors and these are treated separately.

Motivation

What inspired you to submit this pull request?

Additional Notes

Anything else we should know when reviewing?

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

Attention: Patch coverage is 90.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 70.03%. Comparing base (426cd07) to head (199dec9).
Report is 2 commits behind head on feature/view-loading-times.

Files with missing lines	Patch %	Lines
...roid/rum/internal/domain/scope/RumResourceScope.kt	50.00%	0 Missing and 1 partial ⚠️
...ric/networksettled/NetworkSettledMetricResolver.kt	66.67%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                      Coverage Diff                       @@
##           feature/view-loading-times    #2439      +/-   ##
==============================================================
- Coverage                       70.07%   70.03%   -0.04%     
==============================================================
  Files                             775      775              
  Lines                           28708    28722      +14     
  Branches                         4809     4810       +1     
==============================================================
- Hits                            20116    20113       -3     
- Misses                           7273     7280       +7     
- Partials                         1319     1329      +10     

Files with missing lines	Coverage Δ
...g/android/rum/internal/domain/scope/RumRawEvent.kt	100.00% <100.00%> (ø)
.../android/rum/internal/domain/scope/RumViewScope.kt	94.70% <100.00%> (-0.10%)	⬇️
.../android/rum/internal/monitor/DatadogRumMonitor.kt	85.53% <100.00%> (-0.14%)	⬇️
...tadog/android/rum/internal/monitor/StorageEvent.kt	90.00% <100.00%> (ø)
...roid/rum/internal/domain/scope/RumResourceScope.kt	94.41% <50.00%> (-0.72%)	⬇️
...ric/networksettled/NetworkSettledMetricResolver.kt	95.12% <66.67%> (-2.25%)	⬇️

... and 21 files with indirect coverage changes