Trim time-to-full-display span if reportFullyDisplayed API is never called

[stefanosiano]

📜 Description

ttfd span is trimmed if reportFullyDisplayed API is never called
exposed getFinishDate internally in ISpan

💡 Motivation and Context

Currently if the user enables the option to track the fullDisplay, the transaction keeps running and if the manual API is never called, the time-to-full-display span would always last 30 seconds, increasing the transaction duration.
This change aims to mitigate this issue, so that if no other spans are present, the total transaction duration would be until the time-to-initial-display span is finished.

💚 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	316.84 ms	346.52 ms	29.68 ms
Size	1.73 MiB	2.26 MiB	551.46 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
d81684e	235.73 ms	328.76 ms	93.03 ms
17ab223	427.65 ms	484.31 ms	56.65 ms

App size

Revision	Plain	With Sentry	Diff
d81684e	1.73 MiB	2.26 MiB	547.78 KiB
17ab223	1.73 MiB	2.34 MiB	626.85 KiB

Previous results on branch: fix/ttfd-trim

Startup times

Revision	Plain	With Sentry	Diff
db2ee95	289.47 ms	359.70 ms	70.23 ms

App size

Revision	Plain	With Sentry	Diff
db2ee95	1.73 MiB	2.26 MiB	549.71 KiB

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (7b0f520) 81.37% compared to head (54f7e61) 81.37%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #2631   +/-   ##
=========================================
  Coverage     81.37%   81.37%           
- Complexity     4219     4221    +2     
=========================================
  Files           337      337           
  Lines         15599    15601    +2     
  Branches       2037     2037           
=========================================
+ Hits          12693    12695    +2     
  Misses         2111     2111           
  Partials        795      795           

Impacted Files	Coverage Δ
sentry/src/main/java/io/sentry/SentryTracer.java	94.14% <ø> (ø)
sentry/src/main/java/io/sentry/Span.java	89.70% <ø> (ø)
sentry/src/main/java/io/sentry/NoOpSpan.java	27.27% <100.00%> (+2.27%)	⬆️
...entry/src/main/java/io/sentry/NoOpTransaction.java	26.08% <100.00%> (+1.64%)	⬆️

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[markushi]

LGTM!