Port Forward: NavBar Customization

Custom NavBar targets
--Zaphod-Beeblebrox

Fix Navbar for tablets & other non xhdpi devices
--Zaphod-Beeblebrox

Fix improper resizing of navbar icons in landscape
--kwes1020

navbar alpha settings ported from ics
--akellar

SystemUI: fix navbar alpha
--syaoran12

Make navbar background themeable for theme chooser apks
--NMILTNER

Bring back navbar color, glow color, glow dur from ICS
--me..

navbar: ability to open/close notification shade
--jonathongrigg

SystemUI: fixed glow color to look stock
--syaoran12

Bring back down arrow (when IME is showing)
--me..

fix IME down arrow for custom navbar
--Zaphod-Beeblebrox

Navbar: Allow for up to seven navbar buttons
--Stevespear426

IME Toggler as NavBar target
--BMc08GT

adjust navbar logic
--romanbb

Change-Id: I857bfd554d9f057b4c2e29f802635f752ca98576