[LOCAL] Fix CI for RC.2

[cipolleschi]

Summary

Fixes the failing iOS and Android CI on 0.87-stable. Two independent root causes:

iOS — test_ios_rntester (all variants) failing at pod install

The Release 0.87.0-rc.1 bump changed package.json (and thus the versions derived by ReactNativeDependencies.podspec / React-Core), and the later iOS "dependency-only facades" refactor (#57440) changed the pod graph — but packages/rn-tester/Podfile.lock was never regenerated (still pinned to 0.87.0-rc.0 with the old structure). CI's pod update hermes-engine --no-repo-update then hits an unresolvable rc.0-vs-rc.1 conflict on ReactNativeDependencies.

The bump-podfile-lock workflow can't self-heal this: it runs a plain Maven pod install, but the Maven rc.1 React-Core artifact predates the ReactNativeHeaders.xcframework layout that current branch HEAD expects, so that install fails. (This does not affect real npm consumers of 0.87.0-rc.1 — their npm code and Maven artifacts match.)

Fix: regenerated Podfile.lock at HEAD using the fresh, HEAD-matching prebuilts that CI actually consumes (via RCT_TESTONLY_RNCORE_TARBALL_PATH / RCT_USE_LOCAL_RN_DEP), keeping the prebuilds path. The regenerated lock has no machine-local paths and 0 rc.0 references.

Verified locally: after this change, the exact CI step pod update hermes-engine --no-repo-update succeeds (it reproduced the failure beforehand).

Android — build_android failing at ReactAndroid:lintVitalAnalyzeRelease

An internal Android lint K2 UAST analyzer crash (resolveSyntheticJavaPropertyAccessorCall) while analyzing SynchronousMountItem.kt. Code, lint config, and AGP 9.2.1 / Kotlin 2.2.0 toolchain are identical to main (which passes this task fresh), so it's a nondeterministic toolchain bug; abortOnError = false does not suppress an analyzer crash.

Fix: rewrote toString() as an early return instead of assigning an if-expression to a local val, removing the exact AST shape from the crash stack (KotlinULocalVariable + if-expression initializer). Output is unchanged.

Test plan

• iOS: cd packages/rn-tester && bundle exec pod update hermes-engine --no-repo-update succeeds with the fresh prebuilts (as CI does).
• Android: build_android / ReactAndroid:lintVitalAnalyzeRelease should complete (verified by CI — the local Gradle daemon was unavailable on the dev machine).

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