Perform a device pairing with a lockdown client that has an established CU pairing session.
Parameters
client
A lockdown client with an established CU pairing.
Returns
LOCKDOWN_E_SUCCESS on success, LOCKDOWN_E_INVALID_ARG when client is NULL, LOCKDOWN_E_NO_RUNNING_SESSION if the current lockdown client does not have an established CU pairing session, or a LOCKDOWN_E_* error code otherwise.