Always store permission information in eBPF map

The eBPF map could be used for permission referencing in the future when
all device support it. Store the permission information into the map
to support possible future changes. Also fix some nits left from the
previous commit.

Bug: 128944261
Test: dumpsys netd trafficcontroller
Change-Id: I73e08344c83cdf8a601b68c7d0cbcc03dc3444cc