Change NNAPI Memory to ref-counted SharedMemory -- hal am: fadeb8a920 am: 243afb03eb am: 54146d829d

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1593091

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I68e6d3ae01d2074706e5dc5453afd9e6a3789290