Like /system and /product, /product-services will contain apps that
should have the same privileges as the one in other system partitions.

Bug: 80741439
Test: successfully tested e2e on two devices, one with
/product-services partition and another with /product-services
symlinking to -> /system/product-services
Change-Id: Ieee7a9a7641a178f44bb406dbdef39ed46713899