Create PacBusyDialog to be used for boot message dialog and power dialog

Change-Id: I0188ab0ff2cbfbcf5c4321e5d562d0f5d753447d

Conflicts:
	core/res/res/values/symbols.xml
	services/java/com/android/server/power/ShutdownThread.java

Update Busy Progress Bar

Change-Id: Idf4249ecb4ab6ddb9907def0378afc0a2d1458f7