[QA] Replace setOf with HashSet.add

[stefanosiano]

📜 Description

replaced kotlin setOf() with HashSet<>() + add() calls

setOf() was taking ~10ms to run, while instantiating an HashSet and then calling add multiple times is almost instantaneous - at least in debug builds

💡 Motivation and Context

💚 How did you test it?

Unit test

📝 Checklist

• I reviewed the submitted code.
• 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.
• 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.

🔮 Next steps

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	390.57 ms	406.78 ms	16.21 ms
Size	1.70 MiB	2.35 MiB	668.15 KiB

Previous results on branch: fix/replace-setof-with-hashset

Startup times

Revision	Plain	With Sentry	Diff
a5fea3a	396.34 ms	435.88 ms	39.54 ms

App size

Revision	Plain	With Sentry	Diff
a5fea3a	1.70 MiB	2.35 MiB	668.15 KiB

[github-actions]

• 🚫 The changelog entry seems to be part of an already released section ## 7.16.0.
  Consider moving the entry to the ## Unreleased section, please.