fix(session-replay-react-native): pass null deviceId through to native SDKs

[aliaksandr-kazarez]

Summary

• Preserve the nullable React Native public API (string | null) and keep null meaning clear/unset.
• Stop coercing null to an empty string in Android setup and setDeviceId; pass it directly to session-replay-android.
• Declare the iOS Objective-C and Swift setDeviceId bridge parameter nullable end to end.
• Add JS forwarding and native bridge contract tests to prevent null-to-empty-string regressions.

Blocks on

• SDKRN-68: land after GA.
• SDKA-95 / session-replay-android#471: merge and publish the nullable Android API to Maven Central.
• This PR targets the inferred next minor range [0.29.0,0.30.0). If fix(plugins): update timing of sending batches of session replay events #471 ships under a different version, update that range before landing.

Test plan

• TDD red run: new Android and iOS bridge contract tests failed before implementation.
• pnpm exec jest --runInBand --testPathPattern='\\.test\\.(ts|tsx)$' (62 tests passed)
• pnpm typecheck
• pnpm build in packages/session-replay-react-native
• ESLint and Prettier checks for test/session-replay.test.ts
• Android :app:compileDebugKotlin currently stops at dependency resolution because Maven Central has no com.amplitude:session-replay-android version in [0.29.0,0.30.0) yet. Re-run after fix(plugins): update timing of sending batches of session replay events #471 is published.

---

Posted automatically with Cursor. LLMs make mistakes — please verify before acting.

[linear-code]

SDKRN-68

[github-actions]

size-limit report 📦

Path	Size
packages/analytics-browser/lib/scripts/amplitude-min.js.gz	64.33 KB (0%)
packages/session-replay-browser/lib/scripts/session-replay-browser-min.js.gz	135.3 KB (0%)
packages/unified/lib/scripts/amplitude-min.umd.js.gz	218.72 KB (0%)
@amplitude/element-selector (gzipped esm)	3.4 KB (0%)