Start netd before running tests on Buildbot devices.

Ensure netd is running, as otherwise the logcat would be spammed with
the following messages on devices running Android O:

  E NetdConnector: Communications error: java.io.IOException: No such file or directory
  E mDnsConnector: Communications error: java.io.IOException: No such file or directory

Test: art/tools/run-libcore-tests.sh --mode=device
Test: art/tools/run-jdwp-tests.sh --mode=device
Bug: 74725685
Change-Id: I8e26cf1170741e17c3fcf3bc10fc2f56696c9883
1 file changed