Get rid of some global variables - Part 1

* Replace the following global variables with named imports:
  - GrChangeReplyInterface
  - GrEditConstants
  - GrFileListConstants
* Update gr-app-global-var-init.js

Change-Id: I8f19739784789d1f26b893b9faab9d6a279bfc60
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html
index 1c82e5e..40528ff 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view_test.html
@@ -45,6 +45,8 @@
 
 import {dom} from '@polymer/polymer/lib/legacy/polymer.dom.js';
 import {KeyboardShortcutBinder} from '../../../behaviors/keyboard-shortcut-behavior/keyboard-shortcut-behavior.js';
+import {GrEditConstants} from '../../edit/gr-edit-constants.js';
+
 suite('gr-change-view tests', () => {
   const kb = KeyboardShortcutBinder;
   kb.bindShortcut(kb.Shortcut.SEND_REPLY, 'ctrl+enter');