Notification Power Widget: ICS Icons

This commit changes the widget icons to match the ICS default drawables.  I used
as many of the stock icons as possible and made a few custom ones, where missing,
using stock icons as a base. This set includes XHDPI, HDPI and MDPI icons.

The icon olour is the default for ICS where 'on' = white, 20% transparent and
'off' = white, 70% transparent.

Patch set 4 - stat_ring_off and stat_silent now uses same icon
Patch set 5 - stat_vibrate_off uses same icon as _on.  Looks better.
Patch set 6 - media play/pause/next/previous  icons added
Patch set 7 - orientation icons added, removed 2 'broken' icons

This should be all of them now.

Change-Id: I8b90bed6ecd87ef48126452d53f826956d16cff4