Display summary for connected Passpoint credential APs

Connected Passpoint credential APs should now display
<SSID> by <ProviderFriendlyName> in their summary in the wifi picker.

Tracking bug for adding robolectric tests: b/122849296

Bug: 118705403
Test: manual, build and visual check
Change-Id: I5455dddae586379ffca9f7a840bef78942dc3ff1