Merge changes Icca1ccd4,I5188c0ca,I476ac69d,I8ca13279 into main

* changes:
  [5/25] bta::hearing_aid Use stack::l2cap::get_interface()
  [4/25] bta::gatt::client Use stack::l2cap::get_interface()
  [3/25] bta::dm Use stack::l2cap::get_interface()
  [2/25] bta::av Use stack::l2cap::get_interface()