Fix Lock Handle size

Some users have reported that the DU lock image was smaller then the stock image.
This was mostly reported on XHDPI and XXHDPI devices....this should fix that :-)

Before - http://i.imgur.com/cas1Geo.png
After - http://i.imgur.com/3va3x0E.png

Change-Id: I0f3da22ee6f777c85e564eb51b2699c37857a832