p2p: WiFi Direct API for requesting p2p info

Sticky broadcasts is planned to be eliminated. Because some
information is only in these broadcasts, provide API to retrieve
them on demand.

Bug: 64695709
Test: manual test
Test: Unit tests - atest frameworks/opt/net/wifi/tests/wifitests
Change-Id: I88167991a1af6b49d3f976bff1a88f59f6d6adfb