Makes it easier to change when every module isn't specifying how the stubs are built. Also make wifi stubs build against the appropriate api surface, which works around a bug. Bug: 147768409 Bug: 151134996 Test: m Change-Id: I91db06ef932a73002b4fe232566f5d111baef432 Merged-In: I91db06ef932a73002b4fe232566f5d111baef432