wpa_supplicant: Rename |Iface| & |INetwork|

Modify the implementation to reflect the change in the HIDL interface.
Each Iface/Network object now has 2 types based on whether it represents
a P2P or STA iface.
Rename the current Iface & Network classes to StaIface & StaNetwork.

Bug: 32553421
Test: Compiles
Change-Id: Iaa55ddf5e74f4e2d3c8d367917e00a52669c74d6
6 files changed