Look for recent tasks in live stacks.

It is possible for a tasks not to have been saved to the
persisted recent list yet for various reasons. This causes
some external calls to fail when they are trying to do
an operation on a task with a given id. We now use the
stack supervisor look-up for a task id that checks
everywhere a task might be including live stack. It this
fails then the task truly doesn't exist.

Bug: 22924782
Change-Id: I57c3df41d0b4f3ee3c5ae9b7d01eeb2b352062b4