wifi: Added group interface name in P2pProvisionDiscoveryCompleted event

Added group interface name in the notification of provision discovery
frame. A group interface name will be added if the provision discovery
request contains P2P Group ID attribute. i.e.,  when the Peer device tries
to join the existing P2P group owner.

Bug: 296063280
Test: vts test
Test: Ran P2P negotiated connection tests via Wi-Fi Direct settings
      window.
Change-Id: I89c6d64b6d4095ac95cef1fbcd041f7c2dd74647
7 files changed