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

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

Change-Id: Ibc45c83795aa711b8581e6d8277c78291c36e0ac
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>