Add libdexfiled to the stub library multi APEX exception list.

We need to add stubs to it to produce a correct linker config for the
ART debug APEX in eng builds.

We should be able to clean up all the ART exceptions when the debug
APEX is removed. Add a TODO reference to the ticket tracking that.

Test: See the other CL in the topic.
Bug: 349767294
Change-Id: Ida7ea96ccc3e29c2899d5ec12c4e8c8ae983a355