fix: Updating AppHang state on main thread

[philipphofmann]

📜 Description

Move updating the app hang state to a background thread for anrStopped.

💡 Motivation and Context

It came up while investigating #2791

💚 How did you test it?

Unit tests and on a real device.

📝 Checklist

You have to check all boxes before merging:

• 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	1243.26 ms	1264.60 ms	21.34 ms
Size	20.76 KiB	427.35 KiB	406.59 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
bd2afa6	1192.31 ms	1210.37 ms	18.05 ms
7fb7afb	1235.00 ms	1256.81 ms	21.81 ms
3389927	1230.12 ms	1238.04 ms	7.92 ms
0dedab7	1221.26 ms	1235.34 ms	14.08 ms
ff09c7e	1240.94 ms	1262.66 ms	21.72 ms
fdfe96b	1227.90 ms	1242.56 ms	14.66 ms
f8fc36d	1226.31 ms	1247.80 ms	21.49 ms
4d6f273	1195.63 ms	1232.22 ms	36.59 ms
25bcc50	1237.69 ms	1258.40 ms	20.71 ms
8cb9355	1225.23 ms	1231.22 ms	5.99 ms

App size

Revision	Plain	With Sentry	Diff
bd2afa6	20.76 KiB	420.55 KiB	399.79 KiB
7fb7afb	20.76 KiB	419.69 KiB	398.94 KiB
3389927	20.76 KiB	427.23 KiB	406.46 KiB
0dedab7	20.76 KiB	420.00 KiB	399.24 KiB
ff09c7e	20.76 KiB	427.76 KiB	407.00 KiB
fdfe96b	20.76 KiB	419.70 KiB	398.95 KiB
f8fc36d	20.76 KiB	419.70 KiB	398.94 KiB
4d6f273	20.76 KiB	426.93 KiB	406.17 KiB
25bcc50	20.76 KiB	427.23 KiB	406.46 KiB
8cb9355	20.76 KiB	419.70 KiB	398.95 KiB

Previous results on branch: fix/app-hang-stop-main-thread

Startup times

Revision	Plain	With Sentry	Diff
d3e138e	1228.04 ms	1243.32 ms	15.28 ms

App size

Revision	Plain	With Sentry	Diff
d3e138e	20.76 KiB	427.33 KiB	406.57 KiB

[codecov]

Codecov Report

Merging #2793 (7de28ad) into main (f715499) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2793      +/-   ##
==========================================
- Coverage   81.23%   81.20%   -0.03%     
==========================================
  Files         257      257              
  Lines       24206    24204       -2     
  Branches    10776    10774       -2     
==========================================
- Hits        19664    19656       -8     
- Misses       4044     4050       +6     
  Partials      498      498              

Impacted Files	Coverage Δ
Sources/Sentry/SentryANRTracker.m	100.00% <100.00%> (ø)

... and 10 files with indirect coverage changes

---

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[armcknight]

I'm just not sure about whether we want to delay gathering stack traces. It might remove our own code frames, but might make the feature less useful in general.

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- Updating AppHang state on main thread ([#2793](https://github.com/getsentry/sentry-cocoa/pull/2793))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

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