feat(sizeAnalysis): Add enabledVariants property to bypass global ignore rules

[runningcode]

Summary

Adds a new enabledVariants property to SizeAnalysisExtension that allows size analysis to run on specific variants, bypassing the global ignore settings (ignoredVariants, ignoredBuildTypes, ignoredFlavors).

This provides fine-grained control over which variants have size analysis enabled, similar to how distribution.enabledVariants works.

Changes

• Added enabledVariants property to SizeAnalysisExtension with detailed documentation about bypassing behavior
• Added calculateSizeAnalysisEnabled() helper function that handles variant filtering independently from isVariantAllowed
• Refactored AndroidComponentsConfig to handle size analysis and distribution filtering independently
• Added unit tests for the new enabledVariants property
• Added integration tests for the bypass behavior (some tests failing, need investigation)

Behavior

Empty enabledVariants (default)

sizeAnalysis {
  enabled = true
  // enabledVariants is empty - runs on all variants
}

Size analysis runs on all variants (backward compatible).

Specified variants

sizeAnalysis {
  enabled = true
  enabledVariants = ["release", "staging"]
}

Size analysis runs only on specified variants.

Bypassing global ignores

sentry {
  ignoredVariants = ["debug"]  // Most features ignore debug
  sizeAnalysis {
    enabled = true
    enabledVariants = ["debug", "release"]  // Size analysis runs on both
  }
}

Size analysis can run on variants that are globally ignored.

Master kill-switch

sizeAnalysis {
  enabled = false  // Master switch
  enabledVariants = ["release"]  // Ignored when enabled is false
}

The enabled flag still acts as a master kill-switch.

Known Issues

⚠️ Some integration tests are failing - need to investigate:

• size analysis runs on all variants when enabledVariants is empty and enabled is true
• size analysis only runs on specified variants when enabledVariants is not empty
• size analysis bypasses ignoredVariants when enabledVariants is set

These will be fixed before marking the PR as ready for review.

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[github-actions]

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Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

### Features

- Add enabledVariants property to bypass global ignore rules ([#1016](https://github.com/getsentry/sentry-android-gradle-plugin/pull/1016))

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