wifi: Rename country change API

API Review: CountryCodeChangeListener:
CountryCodeChangeListener - should be CountryCodeChangedListener.
Also update the corresponding method (should be onCountryCodeChanged).

Bug: 185121604
Test: atest -c FrameworksWifiTests
Test: atest -c FrameworksWifiNonUpdatableApiTests
Change-Id: I4c2f70d980cedb1c1d5fe83112f0a6479d57af7a
3 files changed