timeseries [5/6] RUM-13949 Wire timeseries collection into RUM session lifecycle

[satween]

What does this PR do?

Adds enableTimeseries()/disableTimeseries() builder methods on RumConfiguration.Builder. Wires the Timeseries.Factory through RumFeature → DatadogRumMonitor → RumApplicationScope → RumSessionScope, so that a new RumSessionScopeTimeseries collector is created and started for each sampled session and stopped on session end or SDK teardown. Also enables timeseries in the Kotlin sample app.

Motivation

Connects the standalone pipeline and public configuration API to the existing RUM session lifecycle, completing the end-to-end data flow from configuration through to event emission.

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)

[satween]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• timeseries [6/6] RUM-13949 Add end-to-end timeseries verification tests with CSV fixtures #3436
• timeseries [5/6] RUM-13949 Wire timeseries collection into RUM session lifecycle #3435 👈 (View in Graphite)
• timeseries [4/6] RUM-13949 Add memory timeseries serializer and session factory #3434
• timeseries [3/6] RUM-13949: Add CPU timeseries data-point reader and serializer #3433
• timeseries [2/6] RUM-13949: Implement timeseries pipeline infrastructure #3432
• timeseries RUM-13949: Add timeseries JSON schemas and regenerate API surface #3431
• feature/timeseries

This stack of pull requests is managed by Graphite. Learn more about stacking.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 49.45055% with 46 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.28%. Comparing base (b30c63a) to head (d4fea36).

Files with missing lines	Patch %	Lines
...lin/com/datadog/android/rum/internal/RumFeature.kt	27.59%	42 Missing ⚠️
.../android/rum/internal/monitor/DatadogRumMonitor.kt	50.00%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@                                       Coverage Diff                                       @@
##           tvaleev/feature/RUM-13949/timeseries-memory-session-factory    #3435      +/-   ##
===============================================================================================
- Coverage                                                        72.33%   72.28%   -0.05%     
===============================================================================================
  Files                                                              976      976              
  Lines                                                            35809    35869      +60     
  Branches                                                          5969     5973       +4     
===============================================================================================
+ Hits                                                             25901    25927      +26     
- Misses                                                            8279     8317      +38     
+ Partials                                                          1629     1625       -4     

Files with missing lines	Coverage Δ
...rum/src/main/kotlin/com/datadog/android/rum/Rum.kt	86.25% <100.00%> (+0.17%)	⬆️
...kotlin/com/datadog/android/rum/RumConfiguration.kt	92.71% <100.00%> (+0.40%)	⬆️
...d/rum/internal/domain/scope/RumApplicationScope.kt	91.47% <100.00%> (-3.77%)	⬇️
...droid/rum/internal/domain/scope/RumSessionScope.kt	91.81% <100.00%> (ø)
...nal/timeseries/RumSessionScopeTimeseriesFactory.kt	100.00% <100.00%> (ø)
...ternal/timeseries/serializer/CpuEventSerializer.kt	96.00% <100.00%> (+0.08%)	⬆️
...nal/timeseries/serializer/MemoryEventSerializer.kt	96.36% <100.00%> (+0.07%)	⬆️
.../android/rum/timeseries/TimeseriesConfiguration.kt	91.67% <100.00%> (+0.76%)	⬆️
.../android/rum/internal/monitor/DatadogRumMonitor.kt	85.92% <50.00%> (-0.39%)	⬇️
...lin/com/datadog/android/rum/internal/RumFeature.kt	83.88% <27.59%> (-8.67%)	⬇️

... and 38 files with indirect coverage changes

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CodeQL | Analyze (java)     

DataDog/dd-sdk-android | analysis:android-lint     

DataDog/dd-sdk-android | analysis:detekt-custom     

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