Fix double launcher icons on home screen

This commit removes LAUNCHER category from colorpick lib
AndroidManifest.xml to avoid double launcher icons for transdroid due to
manifest merge.

external/ColorPickerPreference/AndroidManifest.xml

@@ -8,7 +8,7 @@
                   android:label="@string/app_name">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
+                <!--category android:name="android.intent.category.LAUNCHER" /-->
             </intent-filter>
         </activity>