Remove flag of country code update during setup wizard, and only enable updating country code from scan results for generic case

Since the generic case covers the setup wizard case, we remove setup wizard logic.
And in generic case, we change logic not to depend on selecting candidate.

Updated-Overlayable: TRUE

Bug: 279625751
Test: atest WifiCountryCodeTest
Change-Id: Iea2c4d51ad7cfe5ecd14fe50b39ab5a978c2ae1a
5 files changed