[Files]: Run unit test with V1 version of search.

The unit test as it is currently written, works with V1 version only.
This small CL just makes it so that the test will not start failing
after we enable search V2 by default.

Bug: b:241868453
Change-Id: Ib45791c65b149f120e52a466928249140eaaf2a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4551400


Commit-Queue: Bo Majewski <majewski@chromium.org>
Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1147597}