Allow dumpstate to get information about sockets and dontaudit
accessing vendor files when running df.

Bug: 112440280
Test: cts-tradefed run cts -m CtsSecurityHostTestCases -t android.security.cts.SELinuxHostTest#testNoBugreportDenials
Change-Id: Ide3cb2f3ce3f079bf30b3bd46810f9b55e105b2b