Refactor KeyboardTheme

This CL introduces two preference keys in addition to the existing one.

- pref_keyboard_theme: The new preference key that is used only in the
  preference settings.

- pref_keyboard_layout_20110916: The previous preference key that
  holds keyboard color scheme settings. This is superseded by the next
  key.

- pref_keyboard_theme_20140509: The new preference key that holds
  keyboard theme settings. This value is forcibly reset to LMP theme
  on a LMP device. On a KitKat and previous device, the settings of
  the pref_keyboard_layout_20110916 is carried on into this
  preference.

This CL must be checked in together with Id7b3ddd8aa.

Change-Id: I2d55602d026e30b38d8f822d2124f5c5e4a9a812
diff --git a/java/res/values/keyboard-themes.xml b/java/res/values/keyboard-themes.xml
new file mode 100644
index 0000000..0325f5b
--- /dev/null
+++ b/java/res/values/keyboard-themes.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+**
+** Copyright 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.
+*/
+-->
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <!-- For keyboard color scheme option dialog. -->
+    <string-array name="keyboard_theme_names" translatable="false">
+        <item>@string/keyboard_color_scheme_white</item>
+        <item>@string/keyboard_color_scheme_blue</item>
+        <!-- TODO: Make this item as translatable string resource. -->
+        <item>Quantum</item>
+    </string-array>
+    <!-- An element must be a keyboard theme id of {@link KeyboardTheme#THEME_ID_*}. -->
+    <string-array name="keyboard_theme_ids" translatable="false">
+        <item>2</item>
+        <item>0</item>
+        <item>3</item>
+    </string-array>
+</resources>