fix: Dont take screenshot and view hierarchy for app hanging

[brustolin]

📜 Description

We stop taking screenshot and view hierarchy during app hang events.

💡 Motivation and Context

Main thread is blocked, and its not safe to use ui elements.

💚 How did you test it?

Unit tests

📝 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

[philipphofmann]

LGTM, thanks @brustolin.

[philipphofmann]

Related PR #3547 and issue #3220.

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (7bbb7c3) 89.360% compared to head (362a862) 89.339%.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3620       +/-   ##
=============================================
- Coverage   89.360%   89.339%   -0.022%     
=============================================
  Files          530       530               
  Lines        58243     58231       -12     
  Branches     20891     20883        -8     
=============================================
- Hits         52046     52023       -23     
- Misses        5173      5183       +10     
- Partials      1024      1025        +1     

Files	Coverage Δ
Sources/Sentry/SentryScreenshotIntegration.m	91.489% <100.000%> (-0.348%)	⬇️
Sources/Sentry/SentryViewHierarchyIntegration.m	100.000% <100.000%> (ø)
...Integrations/Screenshot/TestSentryScreenShot.swift	50.000% <0.000%> (-50.000%)	⬇️
...ierarchy/SentryViewHierarchyIntegrationTests.swift	97.478% <50.000%> (-1.681%)	⬇️
.../Screenshot/SentryScreenshotIntegrationTests.swift	98.148% <33.333%> (-1.235%)	⬇️

... and 10 files with indirect coverage changes

---

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1216.94 ms	1244.43 ms	27.49 ms
Size	21.58 KiB	418.76 KiB	397.18 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
43aa39d	1239.16 ms	1270.42 ms	31.26 ms
af1f4dd	1232.39 ms	1255.88 ms	23.49 ms
e778bd2	1224.66 ms	1252.16 ms	27.50 ms
407ff99	1225.49 ms	1232.88 ms	7.39 ms
3297d6e	1206.80 ms	1213.86 ms	7.06 ms
75ef4eb	1237.30 ms	1249.53 ms	12.23 ms
89bc37d	1240.76 ms	1248.24 ms	7.48 ms
d257eb9	1226.08 ms	1256.54 ms	30.46 ms
23ce4a9	1275.73 ms	1278.78 ms	3.05 ms
7cd187e	1204.78 ms	1235.86 ms	31.08 ms

App size

Revision	Plain	With Sentry	Diff
43aa39d	20.76 KiB	432.82 KiB	412.06 KiB
af1f4dd	22.85 KiB	414.71 KiB	391.86 KiB
e778bd2	20.76 KiB	426.15 KiB	405.39 KiB
407ff99	20.76 KiB	427.87 KiB	407.10 KiB
3297d6e	21.58 KiB	418.44 KiB	396.86 KiB
75ef4eb	22.85 KiB	413.45 KiB	390.60 KiB
89bc37d	20.76 KiB	401.53 KiB	380.77 KiB
d257eb9	20.76 KiB	433.23 KiB	412.47 KiB
23ce4a9	22.85 KiB	413.45 KiB	390.60 KiB
7cd187e	20.76 KiB	401.65 KiB	380.89 KiB