Revert "[1/3] fb: Change density on the fly"

This reverts commit ad44c878c3a297cca27352c0568400606612bab4.

Conflicts:
	core/java/android/view/IWindowManager.aidl
	core/java/android/view/WindowManagerPolicy.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
	services/java/com/android/server/wm/WindowManagerService.java