Revert "libprocessgroup users use libcutils" This reverts commit f0336cb586b1c0b25e6afdb28689eb1b69b850d4. Reason for revert: breaks all camera use cases Bug: 135568875 Exempt-From-Owner-Approval: revert, no build cop Change-Id: Ie228b8dd167d4788c3cf570d0ff531e88a06a170