Navbar merge fixes

- removed navbar auto hide
- removed navbar transparency

4.3 introduced a new layout mechanism which conflicted with a few
of our mods.

Enabling and disabling the nav bar also requires a reboot right now.

Signed-off-by: Roman Birg <romanbirg@gmail.com>

Conflicts:
	packages/SystemUI/res/values/config.xml
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

Change-Id: I6ee5077757f7d6ddb2a0615237e3ae902be14cfe
merge with AOKP

Change-Id: I96b9d4347346fd3efeaf9b3b2bf88442f5642eac
check setting only once

Change-Id: I3ab79c4d140a646e490317f055acd494f7d81dda