Added zen settings messages and calls preferences.

- Made ZenModeSettings and ZenModeBehaviorSettings a DashboardFragment
- Switches in ZenModeBehaviorSettings all have their own preference controllers
- Instead of a dropdown, messages & calls have their own pages & preference controllers
- Added basic turn on/off DND button in settings (dialog not yet implemented)

Bug: 63077372
Fixes: 69057767
Test: make -j40 RunSettingsRoboTests
Change-Id: I1c70f77053713f66f873ee578477f23cfd7985bb

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

@@ -0,0 +1,47 @@
+package com.android.settings.notification;
+
+import android.app.NotificationManager;
+import android.content.Context;
+import android.provider.Settings;
+import android.support.v7.preference.Preference;
+
+import com.android.settingslib.core.lifecycle.Lifecycle;
+
+public class ZenModeMessagesPreferenceController extends
+        AbstractZenModePreferenceController {
+
+    protected static final String KEY = "zen_mode_messages";
+    private final ZenModeBackend mBackend;
+
+    public ZenModeMessagesPreferenceController(Context context, Lifecycle lifecycle) {
+        super(context, KEY, lifecycle);
+        mBackend = ZenModeBackend.getInstance(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+
+        switch (getZenMode()) {
+            case Settings.Global.ZEN_MODE_NO_INTERRUPTIONS:
+            case Settings.Global.ZEN_MODE_ALARMS:
+                preference.setEnabled(false);
+                preference.setSummary(mBackend.getContactsSummary(mBackend.SOURCE_NONE));
+                break;
+            default:
+                preference.setEnabled(true);
+                preference.setSummary(mBackend.getContactsSummary(
+                        NotificationManager.Policy.PRIORITY_CATEGORY_MESSAGES));
+        }
+    }
+}