Settings: Add screen color settings

Add "Screen Color" item in settings.
This function support set Hue, Saturation, Contrast and Intensity value,
and screen color will be changed by this settings.

Change-Id: If6f6e7ee7f28862476a8b955cd3252175fefa2a1

Conflicts:
	res/layout/custom_screencolor.xml
	res/layout/screen_color_item.xml
	res/layout/screencolor_settings.xml
	res/values/colors.xml
	res/values/config.xml
	res/xml/display_settings.xml
	src/com/android/settings/CustomScreenColor.java
	src/com/android/settings/DisplaySettings.java