csip: seamless pair with the coordinated set

1. Handle the set member avaiabler intent, check the group is existing and create bond automatically.
2. Accept the paring request for the ongoing set member

Bug: 150670922
Bug: 178981521
Test: pair with one of the CSIP supported device,and get bonded with the
whole coordinated set

Change-Id: Ia95e1ba6dccde0a4e61a9eafdef746b1415704a4