Settings LightSettingsDialog: update led on text change

Change-Id: I135f37829b9b4fb2166afac9d9531b76a62f3ef7
Merge "Settings LightSettingsDialog: update led on text change" into cm-11.0
Merge branch 'cm-11.0' of git://github.com/CyanogenMod/android_packages_apps_Settings into cd-4.4