wifi: Make methods deliver status synchronously (2/3)

Make all the |IWifiChip| HIDL interface methods return a synchronous
status code. Change from using the event callbacks to the synchronous
callbacks for delivering status.

While there,
1. Use std::tie to retrive values out of the legacy HAL functions returning
a pair.
2. Use the std::vector to hidl_vec constructor for returning vector of
ifnames.

Bug: 32056230
Bug: 32061909
Test: Compiles
Change-Id: Iac27521be17cd9852df04ad7d412e09160a08d33