Allow incident to access statsd sockets

For incident section 1116, it runs incident-helper-cmd which executes app_process.
The metrics reporting in app_process currently writes metrics to Statsd.
Now grant the required statsd socket permission.

Bug: 183759310
Test: $ make selinux_policy
      Push SELinux modules
      $ ./pts-tradefed run pts -m PtsSELinuxTest -t com.google.android.selinux.pts.SELinuxTest#scanBugreport
Change-Id: I7a1ff6a3022414c4da2592a9a215d4b5e5f59ca2
1 file changed