perf(android): [SDK Overhead Reduction 2] Replace reflective OptionsContainer with direct subclass

[adinauer]

PR Stack (SDK Overhead Reduction)

• perf(core): [SDK Overhead Reduction 1] Skip java.specification.version lookup on Android #5500
• perf(android): [SDK Overhead Reduction 2] Replace reflective OptionsContainer with direct subclass #5501

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📜 Description

Replace OptionsContainer.create(SentryAndroidOptions.class) — which uses getDeclaredConstructor().newInstance() — with a direct SentryAndroidOptionsContainer subclass that returns new SentryAndroidOptions() without reflection.

To enable subclassing, OptionsContainer is made non-final (@Open) with a protected no-arg constructor. The clazz field becomes @Nullable with a null check in createInstance() for the reflective path (used by non-Android callers).

💡 Motivation and Context

Part of the SDK Overhead Reduction stack. Avoids reflective constructor invocation on the Android cold-start path. While the improvement is below the noise floor in isolation (AR-71 in autoresearch report), it removes unnecessary reflection and is a clean, risk-free change.

💚 How did you test it?

• ./gradlew :sentry:test — all tests pass
• ./gradlew :sentry-android-core:testDebugUnitTest — all tests pass
• ./gradlew spotlessApply apiDump — API change is only the expected non-final + protected ctor

📝 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

More SDK overhead reduction PRs in this stack.

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

#skip-changelog

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.43.1 (1)	release

⚙️ sentry-android Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	311.23 ms	337.56 ms	26.33 ms
Size	0 B	0 B	0 B