Apply cross-user restrictions to Shell

Even though Shell user is allowed to perform cross-user actions,
lock that path down if the target user has restrictions imposed by
the profile owner device admin that prevents access via adb.

If the profile owner has imposed DISALLOW_DEBUGGING_FEATURES, don't
allow the shell user to make the following types of calls:
start activities, make service calls, access content providers,
send broadcasts, block/unblock packages, clear user data, etc.

Bug: 15086577
Change-Id: I9669fc165953076f786ed51cbc17d20d6fa995c3