Fix issue for new account not being shown in work profile.

When refreshing the UI, we tried to only create profile data for new
profile, and skip the initialization for existing profiles. However,
the authentication helper will not get the updated account list, since
the account update listener is being paused. Re-create the
authentication helper to get the latest list of enabled accounts.

Change-Id: Ie29699456e5b32747e8158d51382afaa2c0c5908
Fix: 38302246
Test: make RunSettingsRoboTests