chore: fix e2e tests and enable on CI #115

Job	Run time
detect_changed_packages	6s
Run unit tests (firebase_ui_auth, html)	2m 44s
Run unit tests (firebase_ui_auth, io)	1m 52s
Run unit tests (firebase_ui_firestore, html)	1m 32s
Run unit tests (firebase_ui_firestore, io)	1m 37s
Run unit tests (firebase_ui_oauth, html)	1m 31s
Run unit tests (firebase_ui_oauth, io)	1m 12s
Run unit tests (firebase_ui_oauth_apple, html)	1m 2s
Run unit tests (firebase_ui_oauth_apple, io)	51s
Run unit tests (firebase_ui_oauth_facebook, html)	1m 4s
Run unit tests (firebase_ui_oauth_facebook, io)	56s
Run unit tests (firebase_ui_oauth_google, html)	1m 17s
Run unit tests (firebase_ui_oauth_google, io)	54s
Run unit tests (firebase_ui_oauth_twitter, html)	1m 17s
Run unit tests (firebase_ui_oauth_twitter, io)	54s
Run unit tests (firebase_ui_storage, html)	1m 36s
Run unit tests (firebase_ui_storage, io)	1m 15s
	21m 40s

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