Settings: Do not disturb automatic rule updates.

- Remove FAB for adding rules, move to last preference.
 - Add first-class event condition type and config sub-page.
 - Always show radio buttons when adding rules.
 - Add new data model for event rules.
 - Add stub condition provider for event rules (always false for now).
 - Add rule-type icons to rule preference rows.

Bug: 20064962
Change-Id: Id5acde371eb2e7d22b1f195459897614db5ba80a

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

@@ -73,6 +73,11 @@ public class ZenModeScheduleRuleSettings extends ZenModeRuleSettingsBase {
         return mDays.getKey();
     }
 
+    @Override
+    protected int getEnabledToastText() {
+        return R.string.zen_schedule_rule_enabled_toast;
+    }
+
     @Override
     protected void onCreateInternal() {
         addPreferencesFromResource(R.xml.zen_mode_schedule_rule_settings);