Move ScanResultMatchInfo to its own class

This class is a useful way of grouping scan results into the networks
they represent, agnostic of BSSID. Shifting it so it can be used in
WifiMetrics.

Bug: 36819798
Test: frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Change-Id: Ie4fdb488c7a7cb198e16cd5ba72c354045fbc312
4 files changed