nn: add USE flag for building the minimal driver

BUG=b:154068977
TEST=USE=minimal-driver FEATURES=test emerge-betty \
     chromeos-base/aosp-frameworks-ml-nn

Cq-Depend: chromium:2282930
Change-Id: Iffe36df585e6cb299e46c69b48c9658160aed336
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2283304
Commit-Queue: Jim Pollock <jmpollock@chromium.org>
Commit-Queue: Stuart Langley <slangley@chromium.org>
Tested-by: Jim Pollock <jmpollock@chromium.org>
Reviewed-by: Stuart Langley <slangley@chromium.org>
Auto-Submit: Jim Pollock <jmpollock@chromium.org>
1 file changed