Fix json format in expectations file am: 2a89d29a16 am: 0ed80a184a am: 6a5b2a092f am: f705d20f75

Original change: https://android-review.googlesource.com/c/platform/art/+/2111847

Change-Id: Ifd7d343dd92ad3f420d9b947f42f73fa3ede4b63
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>