Enable night mode for print spooler.

Test: Looked at print preview Ui in night mode
Change-Id: I6c0542228e7117863808eab79b019b191f875ea3
diff --git a/packages/PrintSpooler/res/values-night/themes.xml b/packages/PrintSpooler/res/values-night/themes.xml
new file mode 100644
index 0000000..4428dbb
--- /dev/null
+++ b/packages/PrintSpooler/res/values-night/themes.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2018 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.
+  -->
+
+<resources>
+    <style name="Theme.AddPrinterActivity" parent="@android:style/Theme.DeviceDefault.Dialog">
+        <item name="android:listSeparatorTextViewStyle">@style/ListSeparator</item>
+        <item name="android:textAppearanceListItemSecondary">@style/ListItemSecondary</item>
+    </style>
+
+    <style name="Theme.SelectPrinterActivity"
+           parent="android:style/Theme.DeviceDefault">
+        <item name="android:textAppearanceListItemSecondary">@style/ListItemSecondary</item>
+    </style>
+
+    <style name="Theme.PrintActivity" parent="@android:style/Theme.DeviceDefault">
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowActionBar">false</item>
+        <item name="android:windowNoTitle">true</item>
+    </style>
+
+</resources>