optional encryption password sync

Option to use 2 different tokens for encryption and locking.
Allows convenient usage and strong encryption at the same time.

Inspired by reading next:
https://santoku-linux.com/howto/mobile-forensics/how-to-brute-force-android-encryption

Related discussion:
http://code.google.com/p/android/issues/detail?id=29468

Change-Id: I71a31e7a04b84910d5be317e6f531c41d7ad002f

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

Conflicts:
	src/com/android/settings/SecuritySettings.java
Settings: Add support for variable size pattern lockscreen (Part 2/2) - CM

Part 1: http://review.cyanogenmod.org/#/c/28533/

Forward port of: http://review.cyanogenmod.org/#/c/20614/

Add a menu to choose the pattern unlock screen size (currently 3x3 to 6x6)
Default size is specified in the frameworks

Patch Set 1+2: Initial port

Patch Set 3: Use AOSP code style

Patch Set 4: Fix copy/paste issue

Patch Set 5+6: Comply with framework changes

Change-Id: I5e3d1f8b19b7f5017c854ab9d28b459214f00949

Conflicts:
	src/com/android/settings/ChooseLockGeneric.java
	src/com/android/settings/ChooseLockPatternTutorial.java