ART: Rename 'final' DCE pass to 'after_bce' am: 4b771a13c9

Original change: https://android-review.googlesource.com/c/platform/art/+/2229626

Change-Id: I661bf6513785d29dd64600b47f99f1652b7e840e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>