wifi(implementation): Return proper status code on initialize

The fallback HAL will return |WIFI_ERROR_NOT_SUPPORTED| when
|init_wifi_vendor_hal_func_table| is invoked.  This should be sent as is
to the HIDL interface instead of sending |WIFI_ERROR_UNKNOWN|.

Bug: 34859006
Test: Compiles
Change-Id: I5fd132368715bd158e617ad3cf2e6f88d147cef7
1 file changed