Revert^2 "Define core-current-stubs-for-system-modules-exportable"

This module is an "exportable" version of
core-current-stubs-for-system-modules, which is built as an artifact for
sdk builds.

Test: lunch sdk-trunk_staging-userdebug && m sdk dist sdk_repo
Bug: 359561906
Change-Id: Ia671800305d285b68a426475c444f4640ee8f287