Add id to Plugin VM app management subpages

Currently, Plugin VM subpages such as shared folders or USB do not have
id as a URL param.  As a consequence, if app service sends any events
about apps while the page is open, settings will change to show the main
page since it doesn't recognize the current app page and suspects that
the currently shown app has been deleted.

Change-Id: I650230187e6dc80814ff5b7c5b648c990f349be6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2409464Reviewed-by: Jeevan Shikaram <jshikaram@chromium.org>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807383}

chrome/browser/resources/settings/chromeos/os_apps_page/app_management_page/plugin_vm_page/plugin_vm_detail_view.js

@@ -74,13 +74,15 @@ Polymer({
   /** @private */
   onSharedPathsClick_() {
     settings.Router.getInstance().navigateTo(
-        settings.routes.APP_MANAGEMENT_PLUGIN_VM_SHARED_PATHS);
+        settings.routes.APP_MANAGEMENT_PLUGIN_VM_SHARED_PATHS,
+        new URLSearchParams({'id': this.app_.id}));
   },
 
   /** @private */
   onSharedUsbDevicesClick_() {
     settings.Router.getInstance().navigateTo(
-        settings.routes.APP_MANAGEMENT_PLUGIN_VM_SHARED_USB_DEVICES);
+        settings.routes.APP_MANAGEMENT_PLUGIN_VM_SHARED_USB_DEVICES,
+        new URLSearchParams({'id': this.app_.id}));
   },
 
   /**