Show a skip button during enrolling in case the user entered the flow
accidentally. The skip button will send the result code RESULT_SKIP,
which is equal to RESULT_FIRST_USER + 1, back to the starting
activity.
Bug: 22666389
Change-Id: I230b04e5150214c31536ac282d56b7b490c85ac1
Make a subclass for each enrolling screen that setup wizard uses, and
in override the corresponding get*Intent methods to always use the
setup wizard versions of the next screens.
On minor change made to the original flow is that it will now return
RESULT_OK if it is finished, as opposed to RESULT_CANCELED.
Bug: 21695577
Change-Id: Id666826e8027272ede6a5426967d66fb291670a4
