[RESTRICT AUTOMERGE] Added a missing assert in runPocAssertExitStatusNotVulnerable

Bug: 120499324
Bug: 126802689
Test: Ran the new testcase on android-9.0.0_r39 to test with/without patch

Change-Id: Ice45053d729143a4e23423469cb96e0b28ee0e08
1 file changed