Rework the task affiliate chain validation

The old chain was problematic. It started verification at the end of
the chain and then went no further. Then it went back down the
chain to the beginning with no checks. It also removed entries and
tried to add them back past the end of the ArrayList during boot
which caused the system process to shut down.

This method uses the ordering imposed by taskIds which is the same
order that the tasks were created. It fixes up and notes dropped
links and then reconstructs the list correctly.

Fixes bug 17467284.

Change-Id: I746ec2cdcc7ac6403278cfefc7a6db9b5549d226