Updated IPP Opcode/Attribute validation

We no longer validate specific attribute groupings within operations.
Instead we validate at the per-attribute level only, confirming the same
information as before, and leaving any higher-logic validating to
CUPS.

Bug: chromium:945409
Test: manually confirmed valid attribute/opcode set
Change-Id: I8c2541a8b7a1957239c2468526b75b2a77450646
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1704696
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Luum Habtemariam <luum@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682451}
5 files changed