Forward Port:PacBusyDialog for busy and shutdown

Screw'd:
Ported to Lollipop and augmented for Screw'd AOSP

Conflicts:
	core/res/res/values/symbols.xml
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
	services/java/com/android/server/power/ShutdownThread.java