scanning: Prevent app from opening in browser tab

The first iteration of Scan app will not support having two instances
open at once so we will not allow the app to be opened in a browser tab.

Bug: 1059779
Change-Id: I900e4a8d5d8f38460330d5a358ad12a9df1b3b19
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2568826Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Commit-Queue: Gavin Williams <gavinwill@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832699}

chrome/browser/web_applications/system_web_app_manager.cc

@@ -204,6 +204,7 @@ base::flat_map<SystemAppType, SystemAppInfo> CreateSystemWebApps(
                                 base::BindRepeating(
                                     &CreateWebAppInfoForScanningSystemWebApp)));
     infos.at(SystemAppType::SCANNING).minimum_window_size = {600, 420};
+    infos.at(SystemAppType::SCANNING).capture_navigations = true;
   }
 
   if (SystemWebAppManager::IsAppEnabled(