[patch resend 1/2] oprofile: move task handoff to oprofile

In the discussion surrounding 83dbbdbb3866 ("android, lowmemorykiller: remove task handoff notifier"), I promised to isolate the task handoff notifier to oprofile. The bug that was fixed in that commit occurred because a task handoff notifier registered before oprofile was not freeing the

[patch resend 1/2] oprofile: move task handoff to oprofile

In the discussion surrounding 83dbbdbb3866 (android, lowmemorykiller: remove task handoff notifier), I promised to isolate the task handoff notifier to oprofile. The bug that was fixed in that commit occurred because a task handoff notifier registered before oprofile was not freeing the