Add an API for the net.464xlat.cellular.enabled prop. am: 889f9b1e4e am: ae03c5d2d0 am: 3710b73469

Original change: https://android-review.googlesource.com/c/platform/system/libsysprop/+/1625460

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I122f3b8036b53e41932c421f16d20f0038f10f41
tree: 6ac02de0da1c6bb130c710eaa127113045686087
  1. srcs/
  2. OWNERS