Allow both category of A2DP devices to be connected

Problem: When both A2DP profiles are enabled, only one category
of devices can be connected. If source devices are connected,
then sink device connection are rejected and vice-versa.

Solution: Stack should not differentiate the incoming device
connection and should allow both sink and source devices to be
connected to source and sink profile respectively.

Test: atest net_bt_*
Bug: 325519534
Bug: 321806163
Change-Id: I385b64fc551b49a90c51c132c32634d627b4725b