fix(session-replay): Include layer background color when checking if a view is opaque

[github-actions]

Note

The pull request "fix(session-replay): Include layer background color when checking if a view is opaque" was created by @itaybre but did not reference an issue. Therefore this issue was created for better visibility in external tools like Linear.

📜 Description

Improve check for view opaqueness

💡 Motivation and Context

User's (or libraries) can override UIView's backgroundColor and report a report different value (example).
Since UIView are wrappers around CALayer. we should consider using the actual layers properties too.

This is draft because I have to verify this actually works

💚 How did you test it?

Run the app with Session Replay enabled and view the output.
Still needs more tests with popups and custom views

📝 Checklist

You have to check all boxes before merging:

• 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.

[linear]

COCOA-887