DCE SimplifyAlwaysThrowing optimizations am: 298112a02c am: 936e0e9d00 am: 61c646f8f2 am: 6584a2715b

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

Change-Id: I3dbc09e8de4c4c1d308dcb26d99aad483ba3fee4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>