sepolicy: allow traced to access statsd socket

This allows us to log metrics from traced to statsd
for failures. This is required for implementation of
go/perfetto-failure-stats.

This matches the CL aosp/1512303 which adds the initial logging to
traced.

This solves the following denied message from logcat:
avc: denied { write } for name="statsdw" scontext=u:r:traced:s0
tcontext=u:object_r:statsdw_socket:s0

Bug: 177215620
Change-Id: I4cc613c3a8f4d75c4a5c232b996f8a6cffd3ba9d
1 file changed