ART: Rewrite test 913 verification

Make the test more robust wrt/ the liberty the specification
gives for iteration order. Also make it robust wrt/ JIT by
waiting for any compilation to finish before following
references.

This reverts commit a35c584d.
This reverts commit 8c433b9e.

Test: m ART_TEST_INTERPRETER=true ART_TEST_JIT=true test-art-host-run-test-913-heaps
Change-Id: Ia94c597f4f7b66ab1014efb483b3aed2e859099a