Revert "Revert "Settings: Add support for variable size pattern lockscreen (Part 2/2)""

This reverts commit 061d56832ea0b2bd840fcf3863658dd8b80ded9e.

Conflicts:
	src/com/android/settings/ChooseLockGeneric.java
	src/com/android/settings/ChooseLockPatternTutorial.java
Intent now pointed correctly to ChooseLockPattern

Change-Id: I33c76f9e9ed38ad3ded37d503185e3f09f12f794

Conflicts:
	src/com/android/settings/ChooseLockPatternSize.java