Revert "Start netd before running tests on Buildbot devices."

This partially reverts commit 30d26960774aaa2c5ea647f0a90a562365efab03.

Reason for revert: No longer needed, as the ART Buildbot no longer
uses devices running Android Oreo.

Test: art/tools/run-libcore-tests.sh --mode=device
Test: art/tools/run-jdwp-tests.sh --mode=device
Bug: 74725685
Change-Id: I0df259b07f68601353330da9c4f52b91cad328fd
1 file changed