am 6176790e: am ef16a545: Merge change I2867746d into eclair

Merge commit '6176790ed5f21ab102d438c252509deda050da0b' into eclair-mr2-plus-aosp

* commit '6176790ed5f21ab102d438c252509deda050da0b':
  When a thread is about to be put back onto the thread pool ensure that it is in the foreground cgroup.