feat(android): Add ANR warning breadcrumbs on Android 17+

[markushi]

📜 Description

On Android 17 (API 37) and above, AppLifecycleIntegration now subscribes to ActivityManager.registerAnrWarningListener. The system calls this listener while an ANR timeout is still running, before it declares the app unresponsive. Each warning becomes an app.anr breadcrumb (type: system, level: warning, message: ANR warning) with this data:

• anr_type: the AnrTypes constant as a readable name (for example input_dispatch, broadcast_of_intent, start_foreground_service). An unknown value is kept as unknown (<n>).
• anr_id, timeout_ms, consumed_ms
• description: the description from the system. It is not set if the system gives an empty value.

Details:

• The listener is registered only when enableAppLifecycleBreadcrumbs is enabled.
• Registration is a binder call, so it runs on the SDK executor service, not on the thread that calls Sentry.init.
• The callback runs on the binder thread that delivers it. It does not go to the main thread, because an ANR warning means the main thread is probably already blocked.
• close() unregisters the listener. If the executor drops or rejects the unregister task, it runs inline. A register task that is still in the queue after close() does not register the listener.
• AppLifecycleIntegration now takes (Context, BuildInfoProvider) in its constructor. The public no-arg constructor is kept as @Deprecated. With it, the ANR warning listener is not installed.

Depends on #6242 (JDK 21 build), which is the base branch of this PR.

💡 Motivation and Context

The ANR warning arrives before the ANR. If the app then crashes, records an error, or is killed for the ANR, the event breadcrumbs show that the main thread was already slow, and they show which ANR type and how much of the timeout was used.

• resolves: Add support for reporting AnrWarnings #6244
• resolves: JAVA-771

💚 How did you test it?

• Unit tests in AppLifecycleIntegrationTest (Robolectric, sdk = 37): breadcrumb mapping, unknown ANR types, listener not registered when lifecycle breadcrumbs are disabled or below API 37, registration failure, double close, close while the register task is still in the queue, and a dropped or rejected executor task.
• UI test AnrWarningBreadcrumbTest (API 37 only), verified on an API 37 device: makes service_start_foreground_timeout_ms shorter with device_config and starts SlowStartService, which never calls startForeground(). Then it checks the app.anr breadcrumb in beforeBreadcrumb. The main thread does not block.

📝 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

• Docs: add the app.anr breadcrumb to the Android breadcrumbs page.

🤖 Generated with Claude Code

[linear-code]

JAVA-771

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Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.59.0 (1)	release

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