settings: add menus for EVToolbox/EVUpdater

 This is a squashed commit consisting of:
   - Settings: add an Evervolv category which links to the EVToolbox app
   - Settings: add link to theme app (icons by Adhvanit)
   - Setings: Update toolbox class name & add Updater
     Drawables by: @Mazda--
   - moved from settings_headers.xml to dashboard_categories.xml
   - updated drawables for lollipop

Change-Id: I2b83a8518233c24406f3f2837065c45c73064e63
Signed-off-by: Andrew Sutherland <dr3wsuth3rland@gmail.com>
Signed-off-by: Nick Reuter <nreuter85@gmail.com>