Pre-compute the RTP Header Marker Bit by using the correct peer address

The RTP Header Marker Bit is computed by using the peer address
to lookup the corresponding codec instead of using the codec
for the current active peer.

Also, the pre-computed result is stored in the SCB for the peer instead
of storing a pointer to the current codec config.

Bug: 73897470
Test: Manual - disconnect, reconnect A2DP headsets
Change-Id: Id015de7be2a297b86ac945c7b7c64e6bc13ffc42