[WPA3] Fix connectivity issues with PSK-SAE Transtion mode

Fix two reported issues regarding PSK-SAE transition mode:
1. When phone supports SAE, creating a manual saved network with PSK
and manually connecting would cause the phone to connect but Settings
does not display any connected AP. Phone would not autoconnect.
2. When phone doesn't support SAE, phone cannot connect to an AP in
PSK-SAE Transition mode because the framework always targets the highest
security.

Bug: 132278271
Test: Connect to WPA2 network
Test: Connect to WPA3 network (w/capable phone)
Test: Connect to WPA2/3 Transition w/SAE capable phone
Test: Connect to WPA2/3 Transition w/SAE not-capable phone
Change-Id: I2e2db7a7583b0a8fabbe927e6ab1d04e3edbc000