Grant access to net_raw and net_admin to dumpstate.

These capabilities are required so it can run iptables, otherwise it
will cause failures such as:

06-20 16:19:02.650  5524  5524 W iptables: type=1400 audit(0.0:232): avc: denied { net_raw } for capability=13 scontext=u:r:dumpstate:s0 tcontext=u:r:dumpstate:s0 tclass=capability permissive=0
06-20 16:56:57.119  5070  5070 W iptables: type=1400 audit(0.0:13): avc: denied { net_admin } for capability=12 scontext=u:r:dumpstate:s0 tcontext=u:r:dumpstate:s0 tclass=capability permissive=0

BUG: 29455997
Change-Id: I9c0d1973f166da202d039eac883a6e53d53e24cb