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

This reverts commit 976e92eea279982f49826ba48987aef63ad8c182.

Signed-off-by: scott <scott@ubuntu>

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

Change-Id: I2b66920415079bd46ece12f8bd1782f7bc3d0ca2