chore: fix ios test inconsistency

[metal-messiah]

This PR fixes an issue that causes iOS to fail sporadically due to races between the mobile container and the window being ready to receive commands compared to other browsers.

Overview

Related Issue(s)

Testing

[github-actions]

Supportability Metric Usage Changes:

No matching changes found

Supportability Metrics .md File Changes:

supportability_metrics.md was changed? false

New supportability metrics require changes to supportability_metrics.md, as well as a new PR to Angler. Please ensure an Angler PR is created and linked to this PR.

[github-actions]

Asset Size Report

Merging this pull request will result in the following asset size changes:

Agent	Asset	Previous Size	New Size	Diff
lite	loader	25.9 kB / 9.76 kB (gzip)	25.9 kB / 9.76 kB (gzip)	0% / 0% (gzip)
lite	async-chunk	54.49 kB / 18.02 kB (gzip)	54.49 kB / 18.02 kB (gzip)	0% / 0% (gzip)
pro	loader	54.02 kB / 19.03 kB (gzip)	54.02 kB / 19.03 kB (gzip)	0% / 0% (gzip)
pro	async-chunk	92.76 kB / 28.7 kB (gzip)	92.76 kB / 28.7 kB (gzip)	0% / 0% (gzip)
spa	loader	62.78 kB / 21.74 kB (gzip)	62.78 kB / 21.74 kB (gzip)	0% / 0% (gzip)
spa	async-chunk	117.34 kB / 35.68 kB (gzip)	117.34 kB / 35.68 kB (gzip)	0% / 0% (gzip)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.67%. Comparing base (58f3c52) to head (aca71fd).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1551   +/-   ##
=======================================
  Coverage   87.67%   87.67%           
=======================================
  Files         201      201           
  Lines        7771     7771           
  Branches     1582     1582           
=======================================
  Hits         6813     6813           
  Misses        825      825           
  Partials      133      133           

Flag	Coverage Δ
unit-tests	79.26% <ø> (ø)

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[metal-messiah]

https://github.com/newrelic/newrelic-browser-agent/actions/runs/17216405559

[cwli24]

does this really work? lol