navigation bar: custom height

Conflicts:
	core/java/android/provider/Settings.java
Frameworks: apple can do...we can do as well

incredible apple engineers speeded up the overall UI and reduced per default slightly
the animation scales. Well we do as well and reduce it from 1 to 0.75...smooth, looks well
and does not break anything

Change-Id: I336b95bf198f15edaa4d058db435a2e46c6d8923
Framework: Configurable 0, 90, 180 and 270 degree rotation (1/2)

thanks cm

Change-Id: Ie950679d3515234ab30e6da04cba2659c463425d

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