Show sign-in to network notification to all users, not just owner.

All users should be made aware a captive portal is in place and be
given the opportunity to sign into the network.  Without this fix
other users are not notified and given a chance to sign-in.

Change-Id: I1bf823d5f6a36f391dca4be5f6a584e8562a72a7
Fixes: 23079964