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
Forward the result in the enrolling screen from the finish screen,
so that if the user presses back in "Add another" after enrolling
the first fingerprint, it will return RESULT_CANCELED instead of
RESULT_FINISHED, and go back to find sensor screen.
This results in the following behavioral changes:
- RESULT_FINISHED will only be sent if the user presses "Done" in
FingerprintEnrollFinish. If the user clicks back in
FingerprintEnrollEnrolling, they will always go back to the
previous screen with RESULT_CANCELED, which would either be
FindSensor or FingerprintSettings.
- If the user presses back in FingerprintEnrollFinish, which is only
possible outside of Setup Wizard, they will be back in Find Sensor,
and pressing next will enroll an additional fingerprint.
- Edge case: if the user enrolled the maximum number of
fingerprints, and presses back, they will be bounced all the way
back to Settings > Security.
Bug: 22552741
Change-Id: Ifc5e8a9150491b4303e01ebd0fc17b6d39dd372d
