Don't consider non-enabled users for cross-profile intents.

Previously, if we removed a managed profile and added a new one
immediately:
Until the old managed profile was completely cleaned up,
the presence of the old managed profile prevented cross-profile intents
from working properly with the new managed profile.

BUG:23520975
Change-Id: If46c6c0c0fa000df0982a21272a37fa3da54aa24