[NC#3] clatd: remove raw and packet socket creation privs

Don't need these permission anymore because the raw and packet
socket setup are moved from clatd to netd.

Test: manual test
1. Connect to ipv6-only wifi.
2. Try IPv4 traffic.
   $ ping 8.8.8.8

Change-Id: I07d890df2d1b8d9c1736aa5e6dc36add4f46345b
1 file changed