ART: Rename 'final' DCE pass to 'after_bce' am: 4b771a13c9 am: f1a6bd818b am: 41bd9363ac

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

Change-Id: Ie835405452957490b87c37a6d7516f5999f9f910
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>