Remove launcher category to avoid icon in all-apps.

Change-Id: I16bd2d20a1911ed1a0ed3bf509aa19e2f6fbc780
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 464bf28..4ae2869 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -14,7 +14,6 @@
                   android:launchMode="singleInstance">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
         <service
@@ -27,4 +26,4 @@
             <meta-data android:name="android.service.wallpaper" android:resource="@xml/wallpaper" />
         </service>
     </application>
-</manifest>
\ No newline at end of file
+</manifest>