vts_apex_test: skip the test for old vendor

The O_DIRECT requirement was added in V/202404. U or T vendor might not
be configured properly and we can't enforce it.

Let's skip the test for preinstalled apexes when they come from old
images.

Bug: 357721652
Test: vts_apex_test
Change-Id: Ib1ff4a38827883cf3ef38760a9495cc3e70d2ccc
1 file changed