Exception aggregate for Android platform exceptions

[ueman]

📜 Description

Example: https://jonas-uekotter.sentry.io/share/issue/bd0cdbab9fef4bd8bfffe13517c77288/

@buenaflor @krystofwoldrich I'm not 100% sure whether the result of the changes in this PR is correct, could you double-check whether it's correct? After that, I'll add some tests

💡 Motivation and Context

https://github.com/getsentry/rfcs/blob/main/text/0079-exception-groups.md

Another tiny step towards #1859

💚 How did you test it?

TBD

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPii is enabled
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.24%. Comparing base (fab52eb) to head (0864a24).
Report is 247 commits behind head on release/8.0.0.

Additional details and impacted files

@@                Coverage Diff                @@
##           release/8.0.0    #1998      +/-   ##
=================================================
+ Coverage          88.55%   92.24%   +3.68%     
=================================================
  Files                205       57     -148     
  Lines               6884     1869    -5015     
=================================================
- Hits                6096     1724    -4372     
+ Misses               788      145     -643     

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