Fix malformed json expectations am: 5bdddf911d am: 1d010d4594

Original change: https://android-review.googlesource.com/c/platform/art/+/2117746

Change-Id: I41115d0053bbaa75f94ce1013313a7160f519e81
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>