Keystore 2.0: Test libselinux concurrent access.

This test attempts to corrupt the access vector cache of libselinux by
calling selinux_check_access concurrently. The test will fail if the
cache gets corrupted in such a way that selinux_check_access ends up in
an infinite loop.

Test: atest keystore2_selinux_concurrency_test
Bug: 184006658
Change-Id: I357a4454281bdec9865ac1d8a8343378bac1698d
2 files changed