Hygiene: Some clean-up of mobile Resources.php

Getting rid of boilerplate variable that is only used once and serves
no purpose other than to add one dependency.

Replacing list of dependencies for mobile.special.uploads.scripts
with single mobile.stable dependency (which includes all the rest).

Change-Id: Ib9054ac6842de4e73f3f8c34d1a5546bfe0dcef4
Merge "Hygiene: Some clean-up of mobile Resources.php"