Fix use-after-free crash in VtsHalNeuralnetworksTargetTest. am: dee204e13f am: 6713a4f73f

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/15694529

Change-Id: I9b6f8735f1b1fc1b1c83f1dce1ac1ed0801dc767