Allow dumpstate to call statsd. This is needed for bugreport.

Selinux violations while calling dump() on statsd by bugreport.

avc: denied { call } for scontext=u:r:dumpstate:s0 tcontext=u:r:statsd:s0 tclass=binder permissive=1
denied { use } for path="pipe:[411602]" dev="pipefs" ino=411602 scontext=u:r:statsd:s0 tcontext=u:r:dumpstate:s0 tclass=fd permissive=1
avc: denied { write } for path="pipe:[411602]" dev="pipefs" ino=411602 scontext=u:r:statsd:s0 tcontext=u:r:dumpstate:s0 tclass=fifo_file permissive=1
avc: denied { getattr } for path="pipe:[411602]" dev="pipefs" ino=411602 scontext=u:r:statsd:s0 tcontext=u:r:dumpstate:s0 tclass=fifo_file permissive=1

Test: manual
Change-Id: I46c5b119548378cc80c6e4498d00edad5959d188