audio/avrcp: Use host/network order as appropriate for pdu->params_len

audio/avrcp: Use host/network order as appropriate for pdu->params_len

When comparing against or writing to pdu->params_len to enforce matching
length with total packet length, take into account that pdu->params_len
is in network order (big endian) while packet size (operand_count) is in
host order (usually little endian).

This silently breaks a number of AVRCP commands that perform a quick
length check based on params_len and bail if it doesn't match exactly.

Fixes: e2b0f0d8d ("avrcp: Fix not checking if params_len match number of received bytes")
Signed-off-by: Anuj Jain <anuj01.jain@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>