Closes #5929: Emit facts during migration

[jonalmeida]

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Pull Request checklist

• Quality: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry or does not need one
• Accessibility: The code in this PR follows accessibility best practices or does not include any user facing features

After merge

• Milestone: Make sure issues closed by this pull request are added to the milestone of the version currently in development.
• Breaking Changes: If this is a breaking change, please push a draft PR on Reference Browser to address the breaking issues.

[codecov]

Codecov Report

Merging #5932 into master will decrease coverage by 28.56%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             master    #5932       +/-   ##
=============================================
- Coverage     78.90%   50.33%   -28.57%     
+ Complexity     4988       17     -4971     
=============================================
  Files           591       20      -571     
  Lines         24337      296    -24041     
  Branches       3654       27     -3627     
=============================================
- Hits          19203      149    -19054     
+ Misses         3732      139     -3593     
+ Partials       1402        8     -1394     

Impacted Files	Coverage Δ	Complexity Δ
...lla/components/browser/menu2/candidate/MenuIcon.kt	0.00% <0.00%> (ø)	0.00% <0.00%> (ø%)	⬆️
...a/mozilla/components/concept/push/PushProcessor.kt	95.83% <0.00%> (ø)	0.00% <0.00%> (ø%)	⬆️
...fetch/httpurlconnection/HttpURLConnectionClient.kt	85.52% <0.00%> (+0.37%)	2.00% <0.00%> (-2.00%)	⬆️
...va/mozilla/components/support/locale/Extensions.kt	75.00% <0.00%> (ø)	0.00% <0.00%> (ø%)	⬆️
...mozilla/components/support/locale/LocaleManager.kt	97.61% <0.00%> (ø)	11.00% <0.00%> (ø%)	⬆️
...omponents/support/locale/LocaleAwareApplication.kt	0.00% <0.00%> (ø)	0.00% <0.00%> (ø%)	⬆️
...nts/support/locale/LocaleAwareAppCompatActivity.kt	0.00% <0.00%> (ø)	0.00% <0.00%> (ø%)	⬆️
...la/components/feature/pwa/WebAppShortcutManager.kt
.../java/mozilla/components/concept/fetch/Response.kt
...mozilla/components/support/ktx/kotlin/ByteArray.kt
... and 573 more

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[jonalmeida]

bors r=pocmo

[bors]

Build succeeded

• complete-push