sepolicy: Update the rmt_stroage and rfs_access policies

The rmt_storage and rfs daemons no longer need sys_admin,
dac_overide and net_raw as it now has net_bind_service
capability to access ipcr/qmi sockets.

CRs-Fixed: 1057865
Change-Id: If4acfc4a04ce6c937736e8eaf5cd3bd00591c300