Now classify background processes into a set of bins of how much memory they should try to clear. The last bin also involves destroying all activities in that process. Removed the old code for the simulator that is no longer needed (yay). The debugging features it had are now integrated into the regular oom adj code. Small fixes to load average service. Change-Id: Ic8df401714b188c73b50dbc8f8e6345b58f1f3a0