ART: Rename 'final' DCE pass to 'after_bce' am: 4b771a13c9 am: f1a6bd818b

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

Change-Id: I98987a5df3be5621f81e9f98011aaca71cc32db7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>