OmniGears: Style : New preference category for OMS application

Launch application if installed or propose to install it else

Change-Id: Iafff34d4ace189f2f16b88ef7eb39e34a65e8830
diff --git a/res/xml/style_settings.xml b/res/xml/style_settings.xml
index 3f55725..f3474e5 100644
--- a/res/xml/style_settings.xml
+++ b/res/xml/style_settings.xml
@@ -17,23 +17,33 @@
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
         xmlns:settings="http://schemas.android.com/apk/res/com.android.settings">
 
-        <ListPreference
-            android:key="night_mode"
-            android:title="@string/night_mode_title"
-            settings:keywords="@string/keywords_display_night_mode"
-            android:summary="@string/night_mode_summary"
-            android:entries="@array/night_mode_entries"
-            android:entryValues="@array/night_mode_values" />
+        <PreferenceCategory
+            android:key="category_theming"
+            android:title="@string/theming_title">
 
-        <PreferenceScreen
-            android:key="custom_wall_browse"
-            android:title="@string/custom_wall_browse_title"
-            android:summary="@string/custom_wall_browse_summary"
-            android:persistent="false" >
-            <intent android:action="android.intent.action.MAIN"
-                    android:targetPackage="org.omnirom.omnistyle"
-                    android:targetClass="org.omnirom.omnistyle.BrowseWallsActivity" />
+            <Preference
+                android:key="oms_app"
+                android:title="@string/oms_app_title"
+                android:summary="@string/oms_app_summary"/>
+
+            <ListPreference
+                android:key="night_mode"
+                android:title="@string/night_mode_title"
+                settings:keywords="@string/keywords_display_night_mode"
+                android:summary="@string/night_mode_summary"
+                android:entries="@array/night_mode_entries"
+                android:entryValues="@array/night_mode_values" />
+
+            <PreferenceScreen
+                android:key="custom_wall_browse"
+                android:title="@string/custom_wall_browse_title"
+                android:summary="@string/custom_wall_browse_summary"
+                android:persistent="false" >
+                <intent android:action="android.intent.action.MAIN"
+                        android:targetPackage="org.omnirom.omnistyle"
+                        android:targetClass="org.omnirom.omnistyle.BrowseWallsActivity" />
             </PreferenceScreen>
+        </PreferenceCategory>
 
         <PreferenceCategory
             android:key="category_statusbar"
@@ -92,6 +102,5 @@
                 settings:unitsRight="@string/unit_percent"
                 android:persistent="false"
                 android:dependency="status_bar_custom_header" />
-
         </PreferenceCategory>
 </PreferenceScreen>