Fix art-check-testing-apex-gen. am: ba9748612b

Original change: https://android-review.googlesource.com/c/platform/art/+/2107324

Change-Id: I99af54055c7169acbd5a7f94d3e74e981d6521ac
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>