LockscreenPattern : Toggle dots/error pattern visibility (1/2)

Give user ability to hide error pattern / dots.

Part 2 : http://review.cyanogenmod.org/#/c/33004/

Patchset 2 : Minor formatting
Patchset 3 : Cleanup commit msg

Change-Id: I2af7403b0f72c72e13dd1dec73f8d335ff4029bf

Conflicts:
	core/java/com/android/internal/widget/LockPatternUtils.java
	core/java/com/android/internal/widget/LockPatternView.java
	core/java/com/android/internal/widget/LockSettingsService.java
Add BAMF theme engine

Thanks to travp624 @ TeamBaked for originally porting this

Change-Id: I9dd9347ac62e3b1fb49a4562d84eb7b295cdc2b2