[Settings] Use WifiConfiguration#setSecurityParams

Use WifiConfiguration#setSecurityParams instead of manually
initializing security params.

Bug: 150889755
Test: Created new connections and manually connected to open, WPA2,
WPA3, EAP and SUITE-B networks.

Change-Id: I42f4c21a37428ee87be14f6ba09dc54fa327054a
4 files changed