Audio VTS:  Fix empty parameter list failures for AudioV6 am: 1eb1f36877 am: 0c0bdf4db2 am: 58a2095cc0 am: 10828b9168

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1382482

Change-Id: Iaae812540bac00e8680c4818ca009de42300bcf3