[2/2] CarbonFibers: Add ActiveDisplay settings to menu

Base: http://review.carbon-rom.com/1344
Settings: http://review.carbon-rom.com/1345

PS2: fixup
PS3: fixup2
PS4: missed attrs
PS5: missed another omni!
PS6: derp.  didn't commit...
PS7: duplicates...
PS8: change settings to fibers
PS9: fixup, missing more imports...
PS10: moar imports!
PS11: remove SeekBarPreference.java
PS12: remove "other" SeekBarPreference.java
PS13: change settings to fibers moar
PS14: swap ChaOS ActiveDisplaySettings + other fixes
PS15: add header + icon, builds but FC's?
PS16: try to fix FC, to no avail
PS17: fix commit message (only 2/2, not 3/3)
PS18: Update SettingsActivity.java (thx Andros)
PS19: fixup slider issue (import SliderPref from Omni)
PS20: add better looking images (thanks ShinySide)
PS21: Remove icons, move to LockScreen Settings in CF
PS22: cleanup whitespace from preference_headers.xml, attempt fixup (still broken)

Change-Id: Id52d4831979ae893f5899de953458054f00c5b79