Add custom dnd pages for each dnd auto rule

- Fix strings
- Add zen custom settings dialog when custom settings are being applied
Test: make RunSettingsRoboTests -j40
Bug: 111475013
Fixes: 120787133
Fixes: 120796642
Fixes: 120865472
Change-Id: I34d6b4b23d36277e3704416d65e2418418c124e1

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

@@ -50,7 +50,7 @@ abstract public class AbstractZenModePreferenceController extends
     @VisibleForTesting
     protected SettingObserver mSettingObserver;
 
-    private final String KEY;
+    final String KEY;
     final private NotificationManager mNotificationManager;
     protected static ZenModeConfigWrapper mZenModeConfigWrapper;
     protected MetricsFeatureProvider mMetricsFeatureProvider;