endeavoru: activate LED configuration settings

Overlaying possible speed/length spinner values
with 1 possible element for speed,
and two possible for length
in arrays.xml of Settings app.
Two possible length: Normal and Always on as
they work with current liblights. You can have a
constant green light with Always on.

Change-Id: I419138466731a83270ade8220c2a174c4af01ad8