Revert "Walk up the super chain to find an IMT to share." am: ef0b154451 am: fc616797a2

Original change: https://android-review.googlesource.com/c/platform/art/+/2412272

Change-Id: I5069999b3a59cc6b114a273e0e711d8847c3ee35
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>