Fix empty array object obtain. am: 07b1a4d892

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3311749

Change-Id: Ibdc23a44adc471f89d8d4415ff9fcaa013418d20
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>