Add support for multiple dirty-image-objects files

Allow dex2oat to have multiple --dirty-image-objects inputs.
Modify odrefresh to use dirty-image-objects from ART APEX, if present.
Add test to ensure that odrefresh passes all dirty-image-objects files
to dex2oat.

Bug: 346990440
Test: m test-art-host-gtest-art_dex2oat_tests
Test: atest art_standalone_odrefresh_tests
Change-Id: I11aa8d139577d34e6f4f60321d7344cc6b89526a