Revert "Squashed commit of the theme engine support"

This reverts commit 7e6497bb678c38b4be0395d0fbdead011b4b639a.

Conflicts:
	core/java/android/app/ActivityThread.java
	core/java/com/android/internal/app/ThemeUtils.java
	core/jni/AndroidRuntime.cpp
	data/etc/platform.xml
	media/java/android/media/AudioService.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
	services/java/com/android/server/SystemServer.java
	services/java/com/android/server/wm/WindowManagerService.java