Update print and scan OWNERS

The existing print and scan packages all point to various OWNERS files
in other related projects.  Instead, point them all at the main shared
OWNERS.printscan file.

BUG=b:234625517
TEST=CQ

Change-Id: I6376d657980f1adc47f2fc9011a0cf51661be17b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/4562903
Tested-by: Benjamin Gordon <bmgordon@chromium.org>
Reviewed-by: Nathan Muggli <nmuggli@google.com>
Auto-Submit: Benjamin Gordon <bmgordon@chromium.org>
Commit-Queue: Nathan Muggli <nmuggli@google.com>
8 files changed