Wifi Hal uses some gps components (LOWI) for gscans (location scans).
So, grant it gps group permission.
Denials:
03-03 16:56:03.845 623 6924 I QCALOG : [MessageQ_Client] connecting
to server [/data/misc/location/mq/location-mq-s]
03-03 16:56:03.845 623 6924 E QCALOG : [MessageQ_Client] connect
error: 13, [Permission denied]
Bug: 35959128
Test: Denials no longer seen.
Change-Id: Iddfddb46a585c7c15a26b1fa01889181e4a3cce1