am 1511e20f: improved comments and added a minDelay attribute to sensor_t

Merge commit '1511e20fbbdfe7bf30b9de73f06fc981eb494f09' into gingerbread-plus-aosp

* commit '1511e20fbbdfe7bf30b9de73f06fc981eb494f09':
  improved comments and added a minDelay attribute to sensor_t