perf(android): [Init Reflection 3] Gate Compose class probes behind their features

[runningcode]

PR Stack (Init Reflection)

• perf: Reduce reflection cost during SDK init (Init Reflection stack) #5634 — collection
• perf(core): [Init Reflection 1] Probe class availability without initializing #5635 — [1] Probe class availability without initializing
• perf(core): [Init Reflection 2] Cache class lookups and collapse double probes #5636 — [2] Cache class lookups and collapse double probes
• perf(android): [Init Reflection 3] Gate Compose class probes behind their features #5637 — [3] Gate Compose class probes behind their features

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Part of JAVA-587

📜 Description

The Compose gesture and view-hierarchy class lookups ran during init regardless of configuration. Probing androidx.compose.ui.node.Owner is the most expensive lookup in the trace (it triggers Owner.<clinit> before [Init Reflection 1]).

This gates them behind the features that actually consume them:

• gesture locators (and their Compose probes) → enableUserInteractionBreadcrumbs || enableUserInteractionTracing
• Compose view-hierarchy exporter probe → attachViewHierarchy (default false)

Repeated COMPOSE_CLASS_NAME probes across the two blocks are deduplicated by the LoadClass cache from [Init Reflection 2].

💡 Motivation and Context

Third of three stacked PRs reducing reflection cost on the init path (customer-provided Perfetto trace, Reduce SDK init time [Android]).

💚 How did you test it?

New AndroidOptionsInitializerTest cases: no gesture locators when user interaction tracking is disabled; no Compose view-hierarchy exporter when attachViewHierarchy is off; exporter present when enabled and Compose is available. Full sentry-android-core unit tests pass.

📝 Checklist

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• No breaking change or entry added to the changelog.

🔮 Next steps

Top of the Init Reflection stack.

⏱️ Pixel 3 benchmark (ART method trace → Perfetto trace_processor)

With user interaction tracking and view hierarchy capture disabled, the Compose class probes init used to run unconditionally:

	old (ungated)	new (gated)
Compose class probes	3	0
resulting ClassNotFoundException constructions	9	0

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

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.45.0 (1)	release

⚙️ sentry-android Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	327.50 ms	391.60 ms	64.10 ms
Size	0 B	0 B	0 B

[linear-code]

JAVA-587