New activity that asks users to confirm their pattern. DO NOT MERGE

Adds an activity that prompts the user for their PIN/password/pattern.

cherry-pick from master b88e8577b9049392aa50649cb40edc845d43d689

Bug 16242766

Change-Id: I3468215a8ac522a06de6573c93a5f5a6dc72ee2d
2 files changed