framework/base: Handle P2P-REMOVE-AND-REFORM-GROUP event

Remove P2P group on receipt of P2P-REMOVE-AND-REFORM-GROUP event from
wpa supplicant and then reform new P2P group if autonomous group is
set to true.

Change-Id: Id6fbf2c2ebbebc06afc70cf56a7b434eb8ab2eea
CRs-fixed: 531882