fix(core): Reset contexts when a scope is cleared

[limbonaut]

📜 Description

Scope.clear() is documented as resetting the scope to its default state, but it never touched contexts, so anything set through setContexts survived a clear. Every other field the public API writes to was already being reset. This adds a clear() to Contexts and calls it from Scope.clear(); CombinedContextsView overrides it to delegate to the default scope, matching how it already handles put and remove. Other SDKs, such as JavaScript, Python, Cocoa and native all clear contexts as part of their scope clear. Surfaced while implementing per-capture scopes for the Godot SDK, where identical game code dropped the context on desktop but kept it on Android.

💡 Motivation and Context

Dev docs describe clear as

Reset scope to defaults, keeping event processors.

So this change brings implementation closer to spec.

• Resolvesscope.clear() does not remove contexts #5894

💚 How did you test it?

📝 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

[limbonaut]

Also worth mentioning another thing from Scopes spec: "keeping event processors". Currently, they are cleared. I'm not sure if it's an intentional deviation.

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.52.0 (1)	release

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