am 2c16d1e0: am a163e491: Merge "gralloc: clarify lock_ycbcr in light of multimedia codec usage" into lmp-mr1-dev

* commit '2c16d1e07d4600f78f40d16137c16c3160a3fdef':
  gralloc: clarify lock_ycbcr in light of multimedia codec usage