when A2dp sink and source coexist, AVRCP data process twice

Problem: Currently, when A2dp sink and source coexist,when
we process avrcp data, in function avct_bcb_msg_ind and
avct_lcb_msg_ind , pid was parsed twice,

Solution: in function avct_bcb_msg_ind and avct_lcb_msg_ind
,we only parse pid once

Flag: EXEMPT, no logical change
Bug: 331817295
Test: m com.android.btservices

Change-Id: I2b56dca0bed6aac042f9a82878749a67d53d942a
Signed-off-by: yuanlongquan <yuanlongquan753@gmail.com>