Merge changes from topic "move sched_policy functions"

* changes:
  Add dependencies on libprocessgroup for sched_policy users
  libcutils: Move sched_policy functions into libprocessgroup
  Add libprocessgroup into VNDK
tree: f33fe402fab4b0937d63fdd67c8fd78297b2d5ad
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/