Re-adds CarProperties.user_hal_enabled. am: d18156fd16

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/libsysprop/+/16623822

Change-Id: I91c05f280682b06f25749f4a0937f8674d32353e
tree: 1576a696abd69b09851c3f324d105b4c3d8e440b
  1. srcs/
  2. OWNERS