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

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

Change-Id: Icb26e4e66f5b16578edea6eb565743bf06f863f5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>