Settings: New application-level notification settings.

- Convert the old application-level dialog to an activity.
 - Move the settings icon to the new activity (out of the list).
 - Add a custom application header, similar to the switch bar style.
 - Use the ubiquitous vector gear for the settings icon.
 - Migrate old checkboxes to switch prefs, add new summaries.
 - Remove obsolete artifacts.

Bug:16396715
Change-Id: I857e3cf448b79f44fe1c242e6020f5214434c00c

res/xml/app_notification_settings.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2014 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.
+-->
+
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+        android:title="@string/app_notifications_title"
+        android:key="app_notification_settings">
+
+    <!-- Block -->
+    <SwitchPreference
+            android:key="block"
+            android:title="@string/app_notification_block_title"
+            android:summary="@string/app_notification_block_summary"
+            android:disableDependentsState="true"
+            android:persistent="false" />
+
+    <!-- Priority -->
+    <SwitchPreference
+            android:key="priority"
+            android:title="@string/app_notification_priority_title"
+            android:summary="@string/app_notification_priority_summary"
+            android:dependency="block"
+            android:persistent="false" />
+
+    <!-- Sensitive -->
+    <SwitchPreference
+            android:key="sensitive"
+            android:title="@string/app_notification_sensitive_title"
+            android:summary="@string/app_notification_sensitive_summary"
+            android:enabled="false"
+            android:persistent="false" />
+
+</PreferenceScreen>