Update interface impact API per council comments

- List -> Set
- Consistent API and result class naming

Bug: 222434684
Test: atest WifiManagerTest#testIsItPossibleToCreateInterface
Test: atest android.net.wifi.cts.WifiManagerTest#testIsItPossibleToCreateInterface
Change-Id: I98c91dbb0067ca99a4eedcb1d1185109df7f395c
3 files changed