Revert "Detect system_ext provenance for APKs-in-APEX"

This reverts commit abf29541e5d132e7c8e45ac16343bffbfc558be8.

Reason for revert: This breaks wembley boot, as TreeHugger repeatedly pointed out on this CL, and which was ignored.
Bug: 205967276

Change-Id: Ic5ecc257ec79a759d124da459e0fb584f62c471b
1 file changed