Fix NavBar ring's center layout on lowered DPIs

Change-Id: Id67c3bb1262544732408d2fa7b80755906f2d9f5
Signed-off-by: sethyx <sethyx@gmail.com>

Conflicts:

	packages/SystemUI/res/layout-port/status_bar_search_panel.xml

Signed-off-by: Gergely Szell (sethyx) <szell@hu.ibm.com>