Updated GIDSignIn + GIDSignInInternalOptions Implementations + Unit Tests #935

Job	Run time
app-check-api-token-tests	5m 37s
grab-pr-body	2s
check-pr-body-for-key	4s
swift-button-functional-test	6m 25s
grab-pr-body	3s
app-check-api-token-tests	13m 21s
check-pr-body-for-key	2s
swift-button-functional-test	11m 24s
	36m 58s

Provide feedback