[automerger skipped] Make NNAPI countNumberOfConsumers return GeneralResult -- hal am: 68b6926e am: 01944251 am: e3ece4b5 am: b1bffe46 -s ours

am skip reason: Change-Id Iee54f87768e52fdf701c22d94083c053b881733d with SHA-1 c4d98007 is in history

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1600093

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I09be11725afb8a2fc36b8d67a57cfaa2751449a5