Don't enqueue new compilations when redefinition is in progress am: 1f10bc1854 am: 7843568d41 am: 0d1a406fc3 am: 946a95e59f am: b5a26d1698

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

Change-Id: I8be5bddaf727088a93e35b362d85ac188d5e6e77
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>