Fix fault handler to unregister on shutdown

This fixes a problem with the fault handler where it wasn't
unregistering itself during shutdown of the runtime.

Bug: 17133266

(cherry picked from commit e8b9afcd0cd86b8808af29a97332038aab70c604)

Change-Id: I1a4ec4292ec049046dda30769265680201729efb
4 files changed