settings: Deprecate has_led_flash, move to framework.

 * We need this to configure default tiles in SystemUI so move it.
 * Leave the old one in place so we don't kill every device.

Change-Id: I883f9595f74ab52c8c8152e0105400aaefff4afe
Merge branch 'cm-10.2' of git://github.com/CyanogenMod/android_packages_apps_Settings into cd-4.3