feat: added AndroidNativeAnrEnabled and related options

[bitsandfoxes]

Unity games run in their own game thread that Unity controls. So we keep the flags editor flag AnrDetectionEnabled and AndroidNativeAnrEnabled separated.

There are a couple of follow-ups:

1. The sentry-java manifest needs to accept the historic anr capture flag, see feat: added ANR_REPORT_HISTORICAL to the ManifestMetaDataReader sentry-java#5387
2. Improvements to our C# anr capture mechanism (i.e. to actually capture stack traces and make them actually actionable), see ANR Detection Improvements #1961
3. Add ANR capture to e2e tests
4. Add native ANR trigger to samples

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📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

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