Revert "lineage: Exclude all lineage overlays from RRO"

 * Now that PRODUCT_PACKAGE_OVERLAYS is used instead it's fine
   for Lineage overlays to be in RROs, they won't end up on
   /vendor.

This reverts commit e4868ccb.

Change-Id: I26cb53f6b773821cbb08e4eb309f88d736a31609