[1/2] Settings: instant led test

Show LED color in realtime when configuring
notification colors.

Requires framework patch for notification
extra EXTRA_FORCE_SHOW_LIGHTS.

Change-Id: Ic7858d79cb2351c407afd547b33652a9e04ef1b9
Merge "[1/2] Settings: instant led test" into cm-11.0
Merge branch 'cm-11.0' of git://github.com/CyanogenMod/android_packages_apps_Settings into cd-4.4