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

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

Change-Id: Ie6a2541c8e8a44d849edc9c6b1d9161f8903029d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>