Revert "Migrate frameworks/opt/net/wifi to androidx.test"

This reverts commit 560ff95760cd1fc1da022e0972a5e29b739fcc52.

Reason for revert: Broke master

Exempt-From-Owner-Approval: build fix, pure revert
Change-Id: I9f155cff6a712a6831be6af6b4dc671a35cd2ee1
176 files changed