Add policy disabled msg as empty views in zenmode related fragments.

Change-Id: I0d7489d2884ffd5c227a37a638d560bf033f5cd9

src/com/android/settings/notification/ZenModeEventRuleSettings.java

@@ -72,6 +72,9 @@ public class ZenModeEventRuleSettings extends ZenModeRuleSettingsBase {
     @Override
     public void onResume() {
         super.onResume();
+        if (isUiRestricted()) {
+            return;
+        }
         if (!mCreate) {
             reloadCalendar();
         }