Settings: Create SAR level preference, allow overlay.

Change-Id: I1af616696702f72b8a6276b3b01e940d61735137

Conflicts:
	res/values/cm_strings.xml
	res/values/config.xml
	src/com/android/settings/deviceinfo/Status.java
cmhw: Use hardware's default value for color enhancement

 * First boot should use the value read from sysfs rather than
   forcing the feature to be enabled.

Change-Id: Ibed5d8f3dc3644f972caf07853ca921c963dacfa
cmhw: Use hardware's default value for display features

Change-Id: I1ad4d43ec08fb3a65f2f5d13e48e3becc341d34f

Conflicts:
	src/com/android/settings/DisplaySettings.java