virtio: video: use iter .any() to check presence
virtio: video: use iter .any() to check presence

Rather than using .find().is_none(), use !.any() to fix a new clippy
warning.

BUG=b:197251702
TEST=bin/clippy # with rust-toolchain = 1.54.0

Change-Id: I7e3de6b8e864f74300956c43dffaa033c58b7eb0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3108617
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Commit-Queue: Daniel Verkamp <72bc170b46ec491f7bdd4359a1c0bfed274de40c@chromium.org>
Reviewed-by: Allen Webb <880184b418addffb87cd9c8e8e882ca6764ac96b@google.com>

google/crosvm,google/crosvm,google/crosvm,google/crosvm