feat(replay): Track custom masking usage via integration

[markushi]

📜 Description

Add a ReplayCustomMasking fake integration whenever users use any custom masking API. This tracks adoption of custom masking configurations to help measure usage before potentially switching to the canvas strategy.

Tracking is triggered when any of these are used:

• setMaskAllText()
• setMaskAllImages()
• addMaskViewClass()
• addUnmaskViewClass()
• sentry-mask / sentry-unmask view tags
• sentryReplayMask() / sentryReplayUnmask() Compose modifiers

Container class setters (setMaskViewContainerClass / setUnmaskViewContainerClass) are excluded since React Native sets them unconditionally.

A volatile boolean flag ensures the integration is only registered once, avoiding repeated CopyOnWriteArraySet operations during view hierarchy traversal.

💡 Motivation and Context

We want to track how many users are using custom masking configurations before potentially switching to the canvas recording strategy. This fake integration will appear in the SDK integrations list and can be queried in Looker.

💚 How did you test it?

• Added unit tests to verify the integration is added when masking APIs are called
• Verified default options don't trigger the integration
• Verified container class setters don't trigger the integration

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

Monitor adoption via Looker dashboards.

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

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New Features ✨

• (distribution) Add installGroupsOverride parameter by runningcode in #5066

• (replay) Track custom masking usage via integration by markushi in #5088

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_{🤖 This preview updates automatically when you update the PR.}

[github-actions]

	Messages
📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

Generated by 🚫 dangerJS against cc57cc5

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	306.17 ms	360.84 ms	54.67 ms
Size	1.58 MiB	2.28 MiB	716.28 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
fcec2f2	314.96 ms	373.66 ms	58.70 ms
ee747ae	554.98 ms	611.50 ms	56.52 ms
27d7cf8	306.76 ms	366.66 ms	59.90 ms
fcec2f2	328.91 ms	387.75 ms	58.84 ms
8687935	332.52 ms	362.23 ms	29.71 ms
b77456b	393.26 ms	441.10 ms	47.84 ms
ee747ae	400.46 ms	423.61 ms	23.15 ms
ee747ae	374.71 ms	455.18 ms	80.47 ms
bbc35bb	298.53 ms	372.17 ms	73.64 ms
94bff8d	313.23 ms	352.77 ms	39.54 ms

App size

Revision	Plain	With Sentry	Diff
fcec2f2	1.58 MiB	2.12 MiB	551.50 KiB
ee747ae	1.58 MiB	2.10 MiB	530.95 KiB
27d7cf8	1.58 MiB	2.12 MiB	549.42 KiB
fcec2f2	1.58 MiB	2.12 MiB	551.50 KiB
8687935	1.58 MiB	2.19 MiB	619.17 KiB
b77456b	1.58 MiB	2.12 MiB	548.11 KiB
ee747ae	1.58 MiB	2.10 MiB	530.95 KiB
ee747ae	1.58 MiB	2.10 MiB	530.95 KiB
bbc35bb	1.58 MiB	2.12 MiB	553.01 KiB
94bff8d	1.58 MiB	2.20 MiB	635.37 KiB