[RUM-8785]: Refactoring JankStatsActivityLifecycleListener

[satween]

What does this PR do?

In this PR we decoupling FrameMetrics subscription logic and FPS computation. Listener delegates were introduced for future ui slowness metrics support.

Motivation

This class makes too much work and make impossible to reuse subscription logic. Core idea to subscribe for the metrics in one single place and use collected info in several monitors.

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 76.62338% with 18 lines in your changes missing coverage. Please review.

Project coverage is 70.06%. Comparing base (c0044da) to head (a03d8e8).
Report is 7 commits behind head on develop.

Files with missing lines	Patch %	Lines
...ernal/vitals/JankStatsActivityLifecycleListener.kt	61.54%	8 Missing and 7 partials ⚠️
...og/android/rum/internal/vitals/FPSVitalListener.kt	85.00%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2513      +/-   ##
===========================================
+ Coverage    70.02%   70.06%   +0.05%     
===========================================
  Files          794      796       +2     
  Lines        29875    29927      +52     
  Branches      4991     5001      +10     
===========================================
+ Hits         20917    20968      +51     
+ Misses        7579     7572       -7     
- Partials      1379     1387       +8     

Files with missing lines	Coverage Δ
...lin/com/datadog/android/rum/internal/RumFeature.kt	92.81% <100.00%> (+0.35%)	⬆️
...og/android/rum/internal/domain/FrameMetricsData.kt	100.00% <100.00%> (ø)
...og/android/rum/internal/vitals/FPSVitalListener.kt	85.00% <85.00%> (ø)
...ernal/vitals/JankStatsActivityLifecycleListener.kt	70.80% <61.54%> (+1.64%)	⬆️

... and 26 files with indirect coverage changes

[0xnm]

I left few comments, but nothing blocking.

[0xnm]

why these annotations are needed? If removed, what is the error?

[satween]

We're using buildSdkVersionProvider for OS version resolution. Android Studios's linter is not aware of it and highlighting inappropriate api usage: