Add missing fs-verity setup for UPS.

Similar to what was done for runtime permission, role and package XMLs.

Including deleting the reserve copy file right before copying, so that
we won't try to write to a file with fs-verity enabled.

Bug: 354230498
Flag: EXEMPT bugfix
Test: manual
Change-Id: I373bd2707dbf41053381ec104c8b95f5ac6db173