Move HFM app to Dirty Tweaks [1/2]

* the app stays hidden in app drawer
* it gets started from Dirty Tweaks in Settings

PS3 - Added back in icon/app name due to it being missing when SU was prompted (see pic)
PS4 - Clean up whitespaces

http://i.imgur.com/S47XT2n.png

Change-Id: Ie70afd17a61a116d5ab8109378fee4464d9f65d9