Don't enqueue new compilations when redefinition is in progress am: 1f10bc1854

Original change: https://android-review.googlesource.com/c/platform/art/+/2129478

Change-Id: If3900166b935c22ee723d6ca04bbe9529e70b9a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>