Add PowerWidget configuration support

Signed-off-by: Paul Beeler <sparksco@gmail.com>
Update the ic_grabber drawable with a holo version

Replaces the old gingerbread drawable with one that better
fits the holo design language. Also adds an xhdpi drawable.

Change-Id: I4365f7184f236c6e916015413f9a4f122b8e743c
Merge remote-tracking branch 'sm/sm-jb-mr1-power-widget' into HEAD
power widget:  remove network settings
Signed-off-by: Paul Beeler <sparksco@gmail.com>