feat(profiling): Add Android ProfilingManager (Perfetto) support

[43jay]

📜 Description

Adds support for Android's ProfilingManager API (API 35+), which captures continuous profiles (profile chunks) using OS-level Perfetto stack sampling instead of the legacy Debug.startMethodTracingSampling engine.

Behavior by API level:

• API 35+ — Perfetto profiling via ProfilingManager is used automatically. No configuration needed.
• API < 35 — the legacy Debug-based profiler is used, controlled by the new enableLegacyProfiling option.

⚙️ New options

Option	Manifest key	Default	Description
enableLegacyProfiling	io.sentry.profiling.enable-legacy-profiling	true	Enables the legacy Debug-based profiler on API < 35. Set to false to disable profiling on those devices. Has no effect on API 35+. Will be deprecated in the next major and removed after.

⚠️ Limitations

• Perfetto profiling requires API 35+. On API < 35 with enableLegacyProfiling = false, no profiling data is collected (no silent fallback).
• Only continuous profiling (profile chunks) is supported via ProfilingManager — transaction-based (legacy) profiling is unaffected.
• App-start profiling is not supported on the Perfetto path (ProfilingManager doesn't support it).
• Thread names may be missing in captured traces (ProfilingManager doesn't include linux.process_stats data).

💡 Motivation and Context

💚 How did you test it?

• Unit tests
• Manual testing on Pixel Fold AVD (API 35) — verified Perfetto chunks captured with content_type: "perfetto" and inspected in Perfetto UI.

📝 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.
• Review from the native team if needed.