Implement 'Available via Passpoint' feature [DO NOT MERGE]

This also fixes the issues related to explicit connection
to passpoint AP, and fixes occassional mention of
'connected via Wi-Fi Assistent'

Change-Id: I152cebafa6259194f1d09a6972a3508156335cb6
(cherry picked from commit 08b5b5d439)

src/com/android/settings/wifi/WifiStatusTest.java

@@ -300,7 +300,7 @@ public class WifiStatusTest extends Activity {
             WifiInfo info = mWifiManager.getConnectionInfo();
             String summary = AccessPoint.getSummary(this, info.getSSID(),
                     networkInfo.getDetailedState(),
-                    info.getNetworkId() == WifiConfiguration.INVALID_NETWORK_ID);
+                    info.getNetworkId() == WifiConfiguration.INVALID_NETWORK_ID, null);
             mNetworkState.setText(summary);
         }
     }