fix(expo): Fix expo-auth-session import leak and env var detection #29096

Job	Run time
Check Permissions	6s
Build Packages	34s
Formatting \| Dedupe \| Changeset	49s
Publish with pkg-pr-new	1m 11s
Unit Tests (**)	41s
Static analysis	49s
Unit Tests (**)	36s
Integration Tests (generic, chrome)	1m 1s
Integration Tests (express, chrome)	1m 24s
Integration Tests (sessions, chrome)	1m 0s
Integration Tests (localhost, chrome)	1m 2s
Integration Tests (handshake, chrome)	1m 29s
Integration Tests (handshake:staging, chrome)	1m 10s
Integration Tests (fastify, chrome)	1m 8s
Integration Tests (sessions:staging, chrome)	1m 24s
Integration Tests (ap-flows, chrome)	1m 2s
Integration Tests (chrome-extension, chrome)	1m 7s
Integration Tests (astro, chrome)	1m 0s
Integration Tests (billing, chrome)	1m 2s
Integration Tests (tanstack-react-start, chrome)	1m 9s
Integration Tests (quickstart, chrome, 16)	1m 0s
Integration Tests (nextjs, chrome, 16)	59s
Integration Tests (nuxt, chrome)	1m 10s
Integration Tests (machine, chrome)	1m 9s
Integration Tests (nextjs, chrome, 15)	1m 5s
Integration Tests (quickstart, chrome, 15)	1m 5s
Integration Tests (react-router, chrome)	1m 0s
Integration Tests (cache-components, chrome, 16)	1m 5s
Integration Tests (hono, chrome)	1m 28s
Integration Tests (custom, chrome)	1m 9s
Integration Tests (vue, chrome)	1m 27s
	32m 21s

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