[QA] Cache parsed Dsn

[stefanosiano]

📜 Description

We parse the dsn multiple times in the app lifecycle, and most of the times on the main thread. We can parse it once and cache its result

💡 Motivation and Context

💚 How did you test it?

📝 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	436.98 ms	501.08 ms	64.10 ms
Size	1.70 MiB	2.35 MiB	668.26 KiB

Previous results on branch: fix/cache-parsed-dsn

Startup times

Revision	Plain	With Sentry	Diff
a126274	388.87 ms	427.62 ms	38.75 ms

App size

Revision	Plain	With Sentry	Diff
a126274	1.70 MiB	2.35 MiB	668.43 KiB

[markushi]

LGTM, I left a few comments - please have a look!

[markushi]

This is kind-of brittle, as whoever calls getParsedDsn() first, may receives an exception. On the other hand it was like this before, so all good for now 😃