How to automatically identify ActionScript extensions used by the application in a template

I created a Flex application for AIR mobile platform. I had to modify the Manifest with permissions and activities, so I created a custom template for the application descriptor, instead of using the automatically generated file (under the Android tab of my module).

Generally when I add dependencies to the project, they are added automatically to the generated application descriptor under the extensions tag.
Since I am using a custom template the dependancies are not being added.

 

Is there a way to add the dependancies automatically for a template?