Add test 2000 to redefine-stress skips

The test uses invoke-polymorphic instruction which slicer doesn't know
how to decode.

Test: ./test.py --host --redefine-stress -t 2000
Bug: 37272822
Bug: 146206656
Change-Id: Id78f6baa03f90480fcdf554408d63e48aa5fd326
1 file changed