Add standalone versions of the wallpapers.

Change-Id: I1b0e744d7e37eaede7aec7b205fd106e2aded6ef
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 0194d83..e602eae 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -25,6 +25,30 @@
         android:label="@string/wallpapers"
         android:icon="@drawable/ic_launcher_wallpaper">
 
+        <activity
+            android:label="@string/wallpaper_grass"
+            android:name="com.android.wallpaper.grass.Grass"
+            android:theme="@android:style/Theme.NoTitleBar">
+
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+        </activity>
+        
+        <activity
+            android:label="@string/wallpaper_galaxy"
+            android:name="com.android.wallpaper.galaxy.Galaxy"
+            android:theme="@android:style/Theme.NoTitleBar">
+
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+        </activity>
+        
         <service
             android:label="@string/wallpaper_grass"
             android:name="com.android.wallpaper.grass.GrassWallpaper"