Re-submit "Create all variants of stubs for wifi"

Use sdk_version: module_current instead.

This reverts commit d20f0301.

Test: m
Test: build/soong/soong_ui.bash --make-mode dist ANDROID_BUILDSPEC=vendor/google/build/app_build_spec.mk
Change-Id: I36cf007a4813027721dfb6389e10cf95085f85e4