Update layoutlib for jb mr1. do not merge.

Status bar displayed on all devices.
Update logic for displaying nav bar to whether or not
device has soft button.

Update navigation buttons to new look.
Remove battery and signal from navigation bar.

(cherry picked from commit 891b703f)

Change-Id: Id7cc9ad4255d2c4d2e6461a565dfe2cc17e12e75