am f5e6a211: Merge change 21572 into donut

Merge commit 'f5e6a211b16e26104b6fb2d32ef4eabbf9fbc2d1' into eclair

* commit 'f5e6a211b16e26104b6fb2d32ef4eabbf9fbc2d1':
  Add constants to adjust Vending input and output buffer sizes.