The material design of the request has removed this option from
the dialog, and now needs to be in settings. When screen
pinning is off it shows a description of how to use the feature,
however when on it shows a switch to control whether it locks
the device on exit. This setting defaults to on if there is a
lock pin/pattern.
Bug: 16957435
Change-Id: I59e0d64964cee4302e6ecff59e622cfe11422807
Adds a basic screen for screen pinning (previously lock-to-app) to
settings that describes the feature and allows it to be turned on
and off.
Bug: 16378448
Depends on Ide333463f86310eacb7a1d8b6dc7b1aea8722713 for Settings
constant
Change-Id: Id3ef8471794aa01de20efeb947bed95c50d6b954
