Clear interface address and reset connections

With the broadcom architecture, the p2p interface on a group
was dynamic that would just go away. Clearing addresses
was thus not important before.

It is good to clear up the addresses and reset connections
when the group is removed.

Bug: 7282358
Change-Id: Ia1a94fce90f86b54abcc2d1f78a33524ef8045fa
1 file changed