Enforce Enterprise Wi-Fi secure network configs

Enforce secure Enterprise configurations for TLS-based connections,
by requiring Root CA installed and domain name set, when privileged
or legacy apps call WifiManager#addNetwork or
WifiManager#updateNetwork

Bug: 177029795
Test: atest WifiManagerTest (CTS)
Change-Id: I85ebd39e79f59d08261797d6c156cc66a8737392
1 file changed