DCE SimplifyAlwaysThrowing optimizations am: 298112a02c am: 936e0e9d00

Original change: https://android-review.googlesource.com/c/platform/art/+/2047843

Change-Id: I8b91e9cc3d402b578c89527cfc12f9a08320aaf3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>