chore: fix e2e tests and enable on CI #117

Job	Run time
detect_changed_packages	8s
Run unit tests (firebase_ui_auth, html)	2m 36s
Run unit tests (firebase_ui_auth, io)	1m 26s
Run unit tests (firebase_ui_firestore, html)	1m 32s
Run unit tests (firebase_ui_firestore, io)	1m 16s
Run unit tests (firebase_ui_oauth, html)	1m 30s
Run unit tests (firebase_ui_oauth, io)	1m 6s
Run unit tests (firebase_ui_oauth_apple, html)	59s
Run unit tests (firebase_ui_oauth_apple, io)	53s
Run unit tests (firebase_ui_oauth_facebook, html)	51s
Run unit tests (firebase_ui_oauth_facebook, io)	52s
Run unit tests (firebase_ui_oauth_google, html)	1m 16s
Run unit tests (firebase_ui_oauth_google, io)	1m 10s
Run unit tests (firebase_ui_oauth_twitter, html)	55s
Run unit tests (firebase_ui_oauth_twitter, io)	51s
Run unit tests (firebase_ui_storage, html)	2m 35s
Run unit tests (firebase_ui_storage, io)	1m 43s
	21m 39s

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