[RESTRICT AUTOMERGE] HapticGenerator VTS: validate parameter before setting am: d994467f38 am: 7a03de84af

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3276956

Change-Id: I900caf4f3944130783abdc46fd9b82a19cbc20a4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>