Add an uncaught exception handler in 844-exception. am: 1a9d41ccb0 am: 39e39d58bf

Original change: https://android-review.googlesource.com/c/platform/art/+/2270947

Change-Id: I13b8969f2e33cefb213c42fea6c4cc84149be12d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>