chore(utils): Use single encodeUTF8 impl

[krystofwoldrich]

📢 Type of change

• Enhancement

📜 Description

Just a small refactor to use the same encode function through the whole SDK.

fixes: #4883

💡 Motivation and Context

• follow up to chore(encoding): Use global TextEncode when available #4874

💚 How did you test it?

sample app

📝 Checklist

• 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.
• I updated the wizard if needed.
• All tests passing
• No breaking changes

[github-actions]

iOS (legacy) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1222.55 ms	1218.56 ms	-4.00 ms
Size	2.63 MiB	3.78 MiB	1.15 MiB

Baseline results on branch: v7

Startup times

Revision	Plain	With Sentry	Diff
3c99746+dirty	1215.12 ms	1222.31 ms	7.18 ms

App size

Revision	Plain	With Sentry	Diff
3c99746+dirty	2.63 MiB	3.78 MiB	1.15 MiB

[lucas-zimerman]

LGTM!

[antonis]

LGTM 🙇

[github-actions]

iOS (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1230.16 ms	1228.19 ms	-1.98 ms
Size	3.19 MiB	4.35 MiB	1.16 MiB

Baseline results on branch: v7

Startup times

Revision	Plain	With Sentry	Diff
3c99746+dirty	1227.65 ms	1228.81 ms	1.16 ms

App size

Revision	Plain	With Sentry	Diff
3c99746+dirty	3.19 MiB	4.35 MiB	1.16 MiB

[github-actions]

Android (new) Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	383.02 ms	401.02 ms	18.00 ms
Size	7.15 MiB	8.34 MiB	1.18 MiB

Baseline results on branch: v7

Startup times

Revision	Plain	With Sentry	Diff
3c99746+dirty	400.65 ms	399.59 ms	-1.06 ms

App size

Revision	Plain	With Sentry	Diff
3c99746+dirty	7.15 MiB	8.34 MiB	1.18 MiB