Add a dialog to check if a training entry should be added after PIN unlock

[AlstonLin]

Right now, the flow of having a false negative for unlocks is this.
Right Pattern / Wrong speed -> PIN dialog -> If successful, unlock and add what they entered as an entry to learn

However, sometimes users might want to unlock the phone, but are unable to do the pattern correctly for whatever reasons (eg. other hand is busy). They wouldnt want the expected pattern to change.

Instead, we should ask the user if they want the Lock Screen to learn the pattern they just entered every time they unlock from PIN to prevent this issue.