Import `ls` in NetworkConfigView

Bug: chromium:1136655
Change-Id: I7ea33934c1743fded49c2ff0dbe479c0425ea769
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2626300
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Tim van der Lippe <tvanderlippe@chromium.org>
diff --git a/front_end/network/NetworkConfigView.js b/front_end/network/NetworkConfigView.js
index 2b0c22f..c37ddf6 100644
--- a/front_end/network/NetworkConfigView.js
+++ b/front_end/network/NetworkConfigView.js
@@ -4,6 +4,7 @@
 
 import * as Common from '../common/common.js';
 import * as MobileThrottling from '../mobile_throttling/mobile_throttling.js';
+import {ls} from '../platform/platform.js';
 import * as SDK from '../sdk/sdk.js';
 import * as UI from '../ui/ui.js';