Merge "Convert ashmem bitmap thresholds to constants." into mnc-dr-dev am: c8bb39d98d am: 2c740f1dcf am: 6c1144dc0f
am: 132bb1e4b1

* commit '132bb1e4b10755d2bc0810135511fd999badbe4b':
  Convert ashmem bitmap thresholds to constants.