Add mainline skipping to CVE-20201-0311

Also set the ASB to 2021-01

Bug: 170240631
Test: sts-tradefed run sts-engbuild-no-spl-lock -m CtsSecurityTestCases -t android.security.cts.StagefrightTest#testStagefright_bug170240631
Change-Id: Ieb25e98a5b3f3f90157e032f7fd1aa680749d8e8
1 file changed