First bits of "add a mode"

* Preference below the modes list.
* Temporarily triggers addition of a mode with default name and type=SCHEDULE_TIME (type will be "manual only" later).
* Fixed sorting of modes in the list when refreshing (new modes were added at the bottom instead of where they should, the same would've happened for renamed modes).
* Minor polishes (extracted fragment launch to helper class, renamed item controller class for clarity).

Test: atest com.android.settings.notification.modes
Bug: 326442408
Fixes: 347198709
Flag: android.app.modes_ui
Change-Id: Ie276c92181c5374faf74592433595e7e15a5efc0

src/com/android/settings/notification/modes/ZenSubSettingLauncher.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.notification.modes;
+
+import android.app.settings.SettingsEnums;
+import android.content.Context;
+import android.os.Bundle;
+
+import com.android.settings.core.SubSettingLauncher;
+
+class ZenSubSettingLauncher {
+
+    static SubSettingLauncher forMode(Context context, String modeId) {
+        return forModeFragment(context, ZenModeFragment.class, modeId,
+                SettingsEnums.NOTIFICATION_ZEN_MODE_AUTOMATION);
+    }
+
+    private static SubSettingLauncher forModeFragment(Context context,
+            Class<? extends ZenModeFragmentBase> fragmentClass, String modeId,
+            int sourceMetricsCategory) {
+        Bundle bundle = new Bundle();
+        bundle.putString(ZenModeFragmentBase.MODE_ID, modeId);
+
+        return new SubSettingLauncher(context)
+                .setDestination(fragmentClass.getName())
+                .setArguments(bundle)
+                .setSourceMetricsCategory(sourceMetricsCategory);
+    }
+}