[automerger skipped] DO NOT MERGE Add SEAT_HEADREST_* properties to the emulator for am: 34e7cd0557 am: 321c95cb94 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/19628774

Change-Id: Ib981cbd9ab0af01a38220b83557b25803ece8df6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>