AudioService : BtHleper: fix late BT profile service connection

When a Bluetooth profile service connection callback is received,
more than one device can be already active for some profiles with both
input and output devices (LE Audio, Headset...).

Bug: 316857273
Test: turn BT ON/OFF with LE headset connected.
Change-Id: Ie6b2c257a0ebd61133426eff347ecde72ecd12a3