Bluetooth: ASCS: Update ISO QOS based on BAP QOS

When a CIS is established for the peripheral, then not all
QOS values are completely valid as they are simply missing
from the CIS established event. This commit updates the
missing fields based on the QOS settings provided by the
BAP Unicast Client during QoS Configuration of the endpoint.

Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>