UX requested that we have the settings directly in Security instead
of having a separate screen as implemented previously.
Bug: 26806582
Change-Id: I55c44848621498afe63d3207a52c974c58f9eb78
Create a new section in Security Settings which includes all
settings for the Work Challenge.
Only some settings apply to the Work Challenge, so we reuse
the security settings layouts for items and compare them against
a whitelist to remove unwanted items.
Additionally, remove all usages of ChooseLockGeneric.KEY_USER_ID
in favor of Intent.EXTRA_USER_ID.
Change-Id: I3d1ba953a2056f7c61a7b3feeb8b49f1a352dff6