Revert "fw: Allow custom DPI settings"

This reverts commit cfda98b870a93599d65638a118b5c917ae2208c7.
PA's hybrid engine

Change-Id: If9d2f6e25a3190c8fbaa30fedd748286f7cb8692

Conflicts:
	core/java/android/provider/Settings.java
	core/java/android/view/IWindowManager.aidl
	core/res/res/values/dimens.xml
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java
	packages/SystemUI/src/com/android/systemui/statusbar/toggles/PieToggle.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
	services/java/com/android/server/am/ActivityStack.java
Remove @hide to compile

Change-Id: I29b051fe2dbcf06c548e07aa4c03952b0d225061