Merge "Retire the emulator_car_x86_64 board" into main am: 50a66823a2 am: 035981703d am: f45cdf489c

Original change: https://android-review.googlesource.com/c/device/generic/car/+/2811138

Change-Id: I31d169566945275db30e6351a8efd73bf1d6ded7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>