suppress su behavior when running lsof

Relevant error logs show up when dumpstate do lsof using su identity:
RunCommand("LIST OF OPEN FILES", {"lsof"}, CommandOptions::AS_ROOT);

This is an intended behavior and the log is useless for debugging so I
suppress them.

Bug: 225767289
Test: do bugreport with no su related avc errors
Change-Id: I0f322cfc8a461da9ffb17f7493c6bbdc58cce7b6
1 file changed