feat(android-nav3): [Android Nav3 2] Model navigation routes

[0xadam-brown]

PR Stack (Android Nav3)

• feat(android-nav3): Android Nav3 integration #6105
• feat(android-nav3): [Android Nav3 1] Create the navigation3 module #6106
• feat(android-nav3): [Android Nav3 2] Model navigation routes #6107
• feat(android-nav3): [Android Nav3 3] Track navigation state transitions #6108
• feat(android-nav3): [Android Nav3 4] Introduce SentryNavEffect #6109

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📜 Description

Add the route modeling layer for Android Nav3.

This introduces the code that turns app-owned back stack entries into normalized route names and
sanitized argument payloads, along with focused tests for those translation rules.

💡 Motivation and Context

The rest of the Nav3 integration depends on having one place that defines what a route looks like
and which argument shapes are safe to propagate into Sentry state.

💚 How did you test it?

• ./gradlew :sentry-android-navigation3:testReleaseUnitTest
• ./gradlew spotlessApply
• ./gradlew apiDump

📝 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.
• Public API changes reviewed by another Mobile SDK team member or implemented according to the develop docs spec.

🔮 Next steps

Build the observer layer that consumes these routes and updates Sentry state.

#skip-changelog

⚠️ Merge this PR using a merge commit (not squash). Only the collection branch is squash-merged into main.

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Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.56.0 (1)	release

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