DND ixD changes

- Subtext in Settings > Sound updated
- new icons for automatic dnd rules
- no toast when toggling on/off dnd rules
- dnd dialog has a warning if dnd will cause user to miss next alarm

Test: make ROBOTEST_FILTER=ZenModePreferenceControllerTest RunSettingsRoboTests -j40
Fixes: 72494029
Fixes: 72655216
Fixes: 72655609
Change-Id: I9d86d82529079f35e362f93e10914f0a60229cd8

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

@@ -200,8 +200,7 @@ public class ZenModeScheduleRuleSettings extends ZenModeRuleSettingsBase {
         List<AbstractPreferenceController> controllers = new ArrayList<>();
         mHeader = new ZenAutomaticRuleHeaderPreferenceController(context, this,
                 getLifecycle());
-        mSwitch = new ZenAutomaticRuleSwitchPreferenceController(context, this,
-                R.string.zen_schedule_rule_enabled_toast, getLifecycle());
+        mSwitch = new ZenAutomaticRuleSwitchPreferenceController(context, this, getLifecycle());
 
         controllers.add(mHeader);
         controllers.add(mSwitch);