Add FL6 spec tests to AIDL VTS. am: ca46f9768c am: 65a058482b am: 1a1d9d0325 am: cc144fffe5

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1866682

Change-Id: Ie2b7ae91e0c021b0e97c4b1bbd94ab770f06c35b