Add the "virtual" instance for face HAL retroactively am: f426201991 am: 331cdf4127

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2751164

Change-Id: I2c29015aaffd08b404a716915df73b9ed41d0f09
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>