Removed guest user access to Tap & Pay via Search.

Gathered user info to verify that user is not a guest. If user is a
guest (and only a guest: other alternate users may use the feature),
they are not allowed to load the nfc_payment_settings xml file.

Change-Id: I5700b9cd4b639b031b6d464827d16f4ea4cfa03f
Fixes: 80111261
Test: Robotests