This updated tablet layouts to support showing album art and transport
control views in PIN, pattern and password screens of lock screen.
It also allows the addition of a background protect asset and
the ability to show the system wallpaper on layouts that define a
transport_bg_protect view.
Also updated layout to use new ICS-style buttons on lock screen and
fixed bug with "forgot pattern" button where we were showing the
emergency call icon.
To avoid problems with leading ones in the mono-space clock font,
we now right-justify status text on tablet and remove the AM/PM
indicator.
Status font size adjusted by UX.
Added background protection drop shadow to transport control.
Fixed portrait mode to be right-justified when transport is showing.
Change-Id: I790292fc39f4588f87adc9d9241706817ae6baab
faed16030d