Settings: Allow different maximum vales for each gamma control.

Change-Id: If79a0d988d09ec15e05bc08b5cac7015d793dabc
Fix crash if HW tuning framework isn't present.

Change-Id: I0128d57a5a46e87fe414a2682847ff877d8b1428
Settings: Add string for gamma saturation.

Change-Id: Ie220596712aa90b70cdd98a50448dad9e7ce6e32
Merge "Fix crash if HW tuning framework isn't present." into jb3
Merge "Settings: Add string for gamma saturation." into jb3
Merge branch 'Carbon' into jb3