Provide correct disconnection error code

As per spec:
> When the Controller receives the HCI_Disconnect command, it shall send the HCI_Command_Status event to the Host. The HCI_Disconnection_Complete event will occur at each Host when the termination of the connection has completed, and on the local Host also indicates that this command has been completed. The Reason event parameter in the event on the local Host shall be set to the value Connection Terminated by Local Host (0x16), while that on the remote Host shall be set to the value of the Reason command parameter

Change-Id: I098fc19104a713a7b693b57bcb52a4d7b5023a2f
Test: none
Bug: 270629675