[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
Settings LightSettingsDialog: update led on text change

Change-Id: I135f37829b9b4fb2166afac9d9531b76a62f3ef7