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

Depends on http://review.cyanogenmod.com/20613

With this patch the pattern lockscreen can go from 3x3 to any sane size such as 6x6.

Navigate to Settings->Security->Screen Lock and select "Pattern" like usual.
A new menu will appear to choose the lock pattern size.
Enter and confirm a new pattern of the chosen size.

Patch Set 1-2: Initial Push

Patch Set 3: Fix first time use tutorial

Patch Set 4-6: Various whitespace fixes

Patch Set 7: Switch to the CyanogenMod Copyright

Change-Id: Ieb6beb820d9c6e41c1dee35a042e48d24c61301a

Conflicts:
	res/values/strings.xml