[CrOS Settings] Do not show Cellular on search results if cellular off

This fixes a crash that occurs when users search for cellular search
results when Mobile data is toggled off.

This is a follow up to
https://chromium-review.googlesource.com/c/chromium/src/+/2334402.

Bug: 1110200
Change-Id: Ie2370d4b2143513c239df0516463ab3a8c32b990
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2335394
Commit-Queue: Regan Hsu <hsuregan@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#794187}

chrome/browser/ui/webui/settings/chromeos/internet_section.cc

@@ -880,7 +880,7 @@ void InternetSection::OnDeviceList(
 void InternetSection::FetchNetworkList() {
   cros_network_config_->GetNetworkStateList(
       network_config::mojom::NetworkFilter::New(
-          network_config::mojom::FilterType::kAll,
+          network_config::mojom::FilterType::kVisible,
           network_config::mojom::NetworkType::kAll,
           network_config::mojom::kNoLimit),
       base::Bind(&InternetSection::OnNetworkList, base::Unretained(this)));