Add EAP methods in WifiMetrics

To help find the root cause of high authentication failure rate in enterprise network, add EAP method and authentication phase2 method in connection event metrics.

Bug: 150237135
Test: manual
Test: atest com.android.server.wifi
Change-Id: I0c4ab436b1e43cc52d4bd4dab6c01db53fec91a6
2 files changed