[Metadata] Exclude C1 virtual card art image from metadata metrics logging

Previously we included C1 virtual card art image in the metadata metrics
logging, and included this in the experiment group during evaluating
the suggestion selection conversion rate. However, since this static
image is still not rich card art, we should exclude it.

After the change, the metadata metrics logging considers only product
name and art image sourced from direct issuer metadata integration.

Bug: 1313616, b/277602105
Change-Id: Ife84697a1c3fe54519834ed8e05a53e6fb9a72fb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4420532
Reviewed-by: Vishwas Uppoor <vishwasuppoor@google.com>
Commit-Queue: Siyu An <siyua@chromium.org>
Reviewed-by: Vinny Persky <vinnypersky@google.com>
Reviewed-by: Christoph Schwering <schwering@google.com>
Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1132211}