Add policy for LOOP_CONFIGURE ioctl.

This is a new ioctl for configuring loop devices, and is used by apexd.

Bug: 148607611
Bug: 161575393
Test: boot on device with/without LOOP_CONFIGURE
Change-Id: I9ef940c7c9f91eb32a01e68b858169c140d15d0f
Merged-In: I9ef940c7c9f91eb32a01e68b858169c140d15d0f
4 files changed