Added custom BusyDialog

Credit/Thanks to 0xD34D

Change-Id: I33dcd1b2ca940f24bdf2fbced799b846e5d58e13

Conflicts:
	core/res/res/values/colors.xml
	core/res/res/values/symbols.xml
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java