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: I079881765ea35fec2ad428a981c8cb703737ff11
Make app ops more usable

gets rid of the arbitrary categories,
shows all operations, not just the ones that were in use

operations != permissions. app ops is not permission management

Change-Id: I8570bd14a4b739f33417442d23c400fd2d264904