am f703b77c: Merge "Add system property to turn off scheduling groups." into gingerbread

Merge commit 'f703b77c96a6d133fda534158eaf6190ff7c87f7' into gingerbread-plus-aosp

* commit 'f703b77c96a6d133fda534158eaf6190ff7c87f7':
  Add system property to turn off scheduling groups.