Add the "virtual" instance for face HAL retroactively am: f4262019 am: 331cdf41 am: a8e7d2aa

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



Change-Id: I669915856fe285a2b5080576763446c65194af75
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>