Move automotive display service to /system_ext

Automotive display service is not required on every AAOS device.
To achieve a shared system image across devices, we should move this
service from system partition to system_ext partition.

Bug: 246656948
Test: Build aosp_cf_x86_64_only_auto target and run
      CarEvsCameraPreviweApp.
Change-Id: I30ffb2d90d21d9c9906f5f4bfd4b2819cca866d5
2 files changed