Defer loading of user info until when it's really necessary

[bidetofevil]

Goal

UserInfo was being loaded form preferences way before we actually need it, which delays the execution of startup on the main thread.

Instead, we defer this to when it's consumed by putting it behind a provider which will be executed when it's first read. Access to the in-memory copy is synchronized, which shouldn't impact runtime very much.

This also fixes an existing race condition where concurrent modification could result in some values being lost, though it's probably not very likely.

Testing

Existing tests cover these workflows

[bidetofevil]

• Add fallback start time values for cases where process creation time is unavailable #564
• Initialize native crash monitoring in a background thread #540
• Defer aspects of API service load until necessary #539
• Defer session properties load until it's really needed #538
• Defer loading of user info until when it's really necessary #537 👈
• Synchronize, optimize, and safely delay native module load #536
• Add NDK service tracing #535
• master

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[codecov]

Codecov Report

Attention: Patch coverage is 85.96491% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 79.60%. Comparing base (5e18d90) to head (e028f97).
Report is 4 commits behind head on master.

❗ Current head e028f97 differs from pull request most recent head 41b9ac8. Consider uploading reports for the commit 41b9ac8 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #537      +/-   ##
==========================================
+ Coverage   79.45%   79.60%   +0.14%     
==========================================
  Files         403      403              
  Lines       10861    10885      +24     
  Branches     1602     1605       +3     
==========================================
+ Hits         8630     8665      +35     
+ Misses       1585     1575      -10     
+ Partials      646      645       -1     

Files	Coverage Δ
...cesdk/anr/ndk/EmbraceNativeThreadSamplerService.kt	90.83% <100.00%> (+2.79%)	⬆️
.../io/embrace/android/embracesdk/ndk/NativeModule.kt	100.00% <100.00%> (+21.95%)	⬆️
...embracesdk/anr/ndk/NativeThreadSamplerInstaller.kt	57.14% <50.00%> (+0.89%)	⬆️
...roid/embracesdk/capture/user/EmbraceUserService.kt	72.85% <93.10%> (+6.19%)	⬆️
.../android/embracesdk/internal/SharedObjectLoader.kt	64.28% <61.53%> (-21.43%)	⬇️

... and 6 files with indirect coverage changes

[fractalwrench]

LGTM

[bidetofevil]

Merge activity

• Mar 11, 11:07 AM EDT: @bidetofevil started a stack merge that includes this pull request via Graphite.
• Mar 11, 11:10 AM EDT: Graphite rebased this pull request as part of a merge.
• Mar 11, 11:11 AM EDT: @bidetofevil merged this pull request with Graphite.