Don't crash when the policy service is unavailable.

This isn't a great situation -- it suggests the PolicyService
is having some sort of RemoteException -- but when it happens
we should just treat it the same as if the policy is not
enforced.

Bug: 10315113
Change-Id: If2fbe1648a5c6f3df13cef02c8dc5bc6e858f2d9
1 file changed