Add gesture based lockscreen security. [1/2]

This adds the ability to us a hand drawn gesture as a means
to unlock the device.

In the case that the gesture is forgotton or not
being recognized correctly, the fallback will be the
same as when using patterns.

PS2:
Return SecurityMode.Account as backup for gesture login.

PS3:
Poke the wakelock when a gesture is detected so the screen
will not timeout when an invalid gesture is entered.

PS4:
Clean things up a bit.

Change-Id: I4ca8d7edff0a8906220cf4561d8b90896520e0cd
Frameworks: cleanup

Change-Id: I51271ae4cabe6316f5903c31eb4b8f9843d1a6fe
SystemUI: fix carrier_label single line

Change-Id: Icc233742f1f7405c7cfe87f8dc7e41c0c359e173