fix(replay): Fix Compose masking on obfuscated/minified builds

[romtsn]

📜 Description

Fixes Compose view masking on obfuscated/minified (R8) builds, plus adds a CI mechanism to catch such regressions early.

• Masking fix: the SDK accesses internal Compose LayoutNode members to walk the node tree. On Compose < 1.10 these are looked up via reflection by their mangled names (getChildren$ui_release, getOuterCoordinator$ui_release, getCollapsedSemantics$ui_release). Since they aren't referenced directly, R8 could strip or rename them, silently breaking masking on minified builds. Added consumer proguard keep rules for them.
• Fail-fast in CI: added an internal SentryReplayDebug.failFast switch (gated on the io.sentry.replay.compose.fail-fast system property) that re-throws the exceptions ComposeViewHierarchyNode normally swallows. It's enabled in the sample app and the on-device ReplayTest/ReplaySnapshotTest, so our release/obfuscated builds running on real devices in Sauce Labs crash instead of silently under-masking. Defaults off, so customers are unaffected.
• Guard the on-device replay tests against GitHub-hosted emulators, which can't capture screenshots reliably.

💡 Motivation and Context

On obfuscated/minified builds, R8 could rename/strip the reflected Compose internals, which silently degraded or disabled Compose masking. Because the SDK swallows these errors to avoid crashing customer apps, the regression was invisible in our CI until now.

💚 How did you test it?

Unit tests + on-device ReplayTest/ReplaySnapshotTest running on release/obfuscated builds on real devices (Sauce Labs), which now fail fast if masking breaks.

Example replay: https://sentry-sdks.sentry.io/explore/replays/6783b073aef442a8b4ad8731bf6901fa

📝 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.

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.43.1 (1)	release

⚙️ sentry-android Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	320.94 ms	371.50 ms	50.56 ms
Size	0 B	0 B	0 B

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
2387c2c	317.04 ms	354.60 ms	37.56 ms
91bb874	310.68 ms	359.24 ms	48.56 ms
cf708bd	408.35 ms	458.98 ms	50.63 ms
2195398	321.31 ms	391.66 ms	70.35 ms
e2dce0b	315.85 ms	369.20 ms	53.35 ms
991b33b	326.08 ms	397.82 ms	71.73 ms
4c04bb8	350.71 ms	413.63 ms	62.92 ms
3699cd5	423.60 ms	495.52 ms	71.92 ms
70118e9	380.00 ms	475.72 ms	95.72 ms
694d587	312.37 ms	402.77 ms	90.41 ms

App size

Revision	Plain	With Sentry	Diff
2387c2c	1.58 MiB	2.13 MiB	559.54 KiB
91bb874	1.58 MiB	2.13 MiB	559.07 KiB
cf708bd	1.58 MiB	2.11 MiB	539.71 KiB
2195398	0 B	0 B	0 B
e2dce0b	0 B	0 B	0 B
991b33b	0 B	0 B	0 B
4c04bb8	0 B	0 B	0 B
3699cd5	1.58 MiB	2.10 MiB	533.45 KiB
70118e9	1.58 MiB	2.29 MiB	719.84 KiB
694d587	1.58 MiB	2.19 MiB	620.06 KiB

Previous results on branch: rz/fix/compose-masking-obfuscated-builds

Startup times

Revision	Plain	With Sentry	Diff
ea7fe98	313.04 ms	363.51 ms	50.47 ms
bd23040	313.90 ms	331.71 ms	17.81 ms

App size

Revision	Plain	With Sentry	Diff
ea7fe98	0 B	0 B	0 B
bd23040	0 B	0 B	0 B

[runningcode]

That's a good way to enhance our tests for this!