Frameworks: Moveable navbar (1/2)

New slim feature....phones can decide on the fly if they want
on landscape view a real landscape navbar.

navbar width settings are hidden now for tablet and large screen
new option also

Change-Id: I90aabb875db2c2af53f5993ae6b7d4310eba9d82

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java