Set minimum window size of print management app

- Set minimum window size to 600x320 as per UX guidelines as it
  is the minimum size that displays all informational columns for
  a print job.

Bug: 1053704
Change-Id: I8f122affd87cd8e5cfac20d5ce8d935e3237a49a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2259133Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: jimmy gong <jimmyxgong@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781605}

chrome/browser/web_applications/system_web_app_manager.cc

@@ -143,6 +143,7 @@ base::flat_map<SystemAppType, SystemAppInfo> CreateSystemWebApps() {
         std::forward_as_tuple("PrintManagement",
                               GURL("chrome://print-management/pwa.html")));
     infos.at(SystemAppType::PRINT_MANAGEMENT).show_in_launcher = false;
+    infos.at(SystemAppType::PRINT_MANAGEMENT).minimum_window_size = {600, 320};
   }
 
   if (SystemWebAppManager::IsAppEnabled(SystemAppType::TELEMETRY)) {