Avoid adding duplicated VNDK versions am: f79d30a7a7 am: 4b0fe21b40

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/2739456

Change-Id: I4f7045e888604077c7c219587a64ac43a08b0d23
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>