Revert "ART: Disable part of ImageSpace loading test"

This reverts commit 4b3fdfe0919e8de954924ec6b785743eb4895e80.

The bug 63622587 was fixed by
    https://android-review.googlesource.com/524979 .

Test: m test-art-host-gtest-image_space_test
Bug: 63622587
Change-Id: I7d2e8b6902d01b0ac7b7813d48a550341583601b
1 file changed