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/src/com/android/systemui/TransparencyManager.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java