NavigationBar : Customization

Includes:

- Allows user to customize navigation bar.
  Features :
   - Choose from 1-6 # of buttons
   - Re-arrange / assign buttons
  Id: Idc9f5f401f15d207504e49de47666bb5510a06ca

- Navbar : Rework logic for determining orientation
  This patch introduces better checks for hybrid ui's.
  This should fix issues of small buttons due to incorrect ui determination
  Thanks Rolf Arne Schulze for testing :)
  Id: If5b61dc4764a98deedb5b801d11451fed2488cba

Change-Id: I8903b85b6ee8581f8564d9dc7b0d40f645d7647a

Port from cm10.1

Signed-off-by:  Paul Beeler <sparksco@gmail.com>

Conflicts:
	packages/SystemUI/res/drawable-xhdpi/ic_sysbar_back_land.png
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
NavigationBar: Custom height (1/2)

Patchset 3 : Fix default value derp
Patchset 4 : Fix custom height during landscape

Change-Id: I61aef192ac658f54f86b87d18cce9d7b073004e2

Forward Port from cm10, patch was originaly abandoned, but it still
lives!

Signed-off-by:  Paul Beeler <sparksco@gmail.com>