Merge changes from topic "b169145796-kgd-pin-input"

* changes:
  10/N Ensure KeyguardSecurityContainer always has Callback
  Revert^2 "9/N Clean Up Keyguard Class Structure"
  Revert^2 "8/N Remove View Injection from KeyguardMessageArea"
  Revert^2 "7/N controllers for remaining Keyguard Password ..."
  Revert^2 "6/N Add Controller for KeyguardPatternView"
  Revert^2 "5/N Add KeyguardSecurityViewFlipperController."
  Revert^2 "4/N Setup Controller fo KeyguardSecurityContainer."