fix(android): Make FirstDrawDoneListener cleanup OnGlobalLayoutListener after use

[romtsn]

📜 Description

The OnGlobalLayoutListener registered in onDraw() to defer removal of the OnDrawListener was never itself removed from the ViewTreeObserver. In single-Activity apps (e.g. React Native), this caused an unbounded per-navigation leak — one listener per registerForNextDraw call, each pinning the dismissed screen's view tree.

The fix makes the OnGlobalLayoutListener remove itself after firing.

Note: this bug was inherited from Firebase's original implementation, which has the same issue.

💡 Motivation and Context

• resolves: FirstDrawDoneListener leaks an OnGlobalLayoutListener per registration, pinning the watched view tree (unbounded per-navigation leak in single-Activity apps) #5495
• resolves: JAVA-545

~80–100 MB of Java heap retained after ~50 navigations in the reporter's RN app, with leaked listener count tracking navigations 1:1.

💚 How did you test it?

• Added a regression test that verifies mOnGlobalLayoutListeners is empty after the cleanup fires
• Confirmed the test fails without the fix and passes with it

📝 Checklist

• I added GH Issue ID & Linear ID
• 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.
• I updated the wizard 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

[linear-code]

JAVA-545

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.44.0 (1)	release

⚙️ sentry-android Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	385.04 ms	477.47 ms	92.43 ms
Size	0 B	0 B	0 B

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
a416a65	333.78 ms	410.37 ms	76.59 ms
d15471f	304.55 ms	408.43 ms	103.87 ms
ca6b6d8	380.45 ms	460.38 ms	79.93 ms
c8125f3	397.65 ms	485.14 ms	87.49 ms
b936425	302.69 ms	372.86 ms	70.17 ms
ed33deb	334.19 ms	362.30 ms	28.11 ms
cf708bd	408.35 ms	458.98 ms	50.63 ms
eb95ded	317.51 ms	369.08 ms	51.57 ms
a5ab36f	320.47 ms	389.77 ms	69.30 ms
80fd6ad	321.06 ms	375.79 ms	54.73 ms

App size

Revision	Plain	With Sentry	Diff
a416a65	1.58 MiB	2.12 MiB	555.26 KiB
d15471f	1.58 MiB	2.13 MiB	559.54 KiB
ca6b6d8	0 B	0 B	0 B
c8125f3	1.58 MiB	2.10 MiB	532.32 KiB
b936425	0 B	0 B	0 B
ed33deb	1.58 MiB	2.13 MiB	559.52 KiB
cf708bd	1.58 MiB	2.11 MiB	539.71 KiB
eb95ded	0 B	0 B	0 B
a5ab36f	1.58 MiB	2.12 MiB	555.26 KiB
80fd6ad	0 B	0 B	0 B

[runningcode]

nice fix!