Fix class-after-object map creation logic

Test: module install and enable userfaultfd GC
Bug: 263267470
Bug: 160737021
Change-Id: I9606be82a073f0b8315d425652ddaa8b8c2f56f1
(cherry picked from commit 80cd10dc868a0f8b6705fa1c20086b6aabd3f0fe)
Merged-In: I9606be82a073f0b8315d425652ddaa8b8c2f56f1
1 file changed