Navbar: Fix MDPI & HDPI landscape layout

Before: http://i.imgur.com/89SmFbX.png
After: http://i.imgur.com/UbuAggD.png

Change-Id: I6623cb97881313886de39a67baa98f7bd4b0696a
(cherry picked from commit 8986060ea438fc8efc75c3a72d7cd9cb253d7d28)
Fix hdpi/mdpi statusbar layout

Fix hdpi/mdpi statusbar cut-offs
Previously, the QS/NOTIFICATION toggle was cut-off when halo and clear-all button were aviable at the same time

SystemUI: Increase hdpi/mdpi statusbar header margins
(cherry picked from commit 087738d622c7dae829c5d9ddc8f8ff0e3ce9a71e)
SystemUI: new drawables to fix signal bar color when data is off
Credits to @szlkiev & @garwedgess / PAC-man

(cherry picked from commit 913f7f9cef41082d4b35f5a5d22ef3da0255913a)