hal: Fix Rx/Tx mute during HFP call

Rx/Tx are mute during 2nd HFP client call.
Primay output is closed but handle is not reset during first call
disconnect so output is not opened for 2nd call causing rx/rx mute.
Reset primary output handle during close output stream to fix the issue.

CRs-Fixed: 1111824
Change-Id: Icf54ed0debc96181d5181c7e48b2e9849d88a8f7