[Sb refactor] Move shouldShowActivityConfig to ConnectivityConstants

This field was needed both for mobile and wifi. This CL updates the wifi
pipeline to use the `ConnectivityConstants` version to keep things
centralized.

Test: WifiViewModelTest
Bug: 238425913
Change-Id: Ia681c648a10c1daba48916ca48a41e0aec236a79
3 files changed