Extract frame draw detection to its own component

[bidetofevil]

Goal

Extract the code to detect when a app startup is ended by the first activity drawing its first frame into its own class so it can be used for the UI Load trace as well.

[bidetofevil]

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

• Make FirstDrawDetector a singleton #1796
• Add unregistering of draw callback #1795
• Add render detection to UI Load traces #1794
• Extract frame draw detection to its own component #1793 👈 (View in Graphite)
• Restructure assertions to remove magic numbers #1791
• API and integration tests for manually ending UI load traces #1790
• Allow all activities to ge traced by default #1789
• Remove the reset event #1788
• Change start time of UI Load traces #1787
• Align event emitter names with lifecycle methods #1786
• main

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[codecov]

Codecov Report

Attention: Patch coverage is 43.75000% with 36 lines in your changes missing coverage. Please review.

Project coverage is 85.52%. Comparing base (ac7156a) to head (eb153a4).

Files with missing lines	Patch %	Lines
...ndroid/embracesdk/internal/ui/FirstDrawDetector.kt	26.53%	31 Missing and 5 partials ⚠️

Additional details and impacted files

@@                      Coverage Diff                      @@
##           hho/improve-ui-load-tests    #1793      +/-   ##
=============================================================
+ Coverage                      85.50%   85.52%   +0.01%     
=============================================================
  Files                            467      468       +1     
  Lines                          10961    10962       +1     
  Branches                        1628     1629       +1     
=============================================================
+ Hits                            9372     9375       +3     
+ Misses                           861      857       -4     
- Partials                         728      730       +2     

Files with missing lines	Coverage Δ
...racesdk/internal/capture/startup/StartupTracker.kt	90.24% <100.00%> (+39.69%)	⬆️
...internal/injection/DataCaptureServiceModuleImpl.kt	95.45% <100.00%> (+0.10%)	⬆️
...d/embracesdk/internal/logging/InternalErrorType.kt	100.00% <100.00%> (ø)
...ndroid/embracesdk/internal/ui/FirstDrawDetector.kt	26.53% <26.53%> (ø)

... and 2 files with indirect coverage changes

[fractalwrench]

LGTM