Reports: Fix task count logic for age histogram
Sum of all task numbers in Age Distribution bars is 16 lower than number of "Remaining open tasks" in the Throughput section. Except for the first bucket, each bucket was off by 1 due to not adding the first match of the condition "$age > $current" to the next bucket.
Furthermore, $next === false
cannot trigger as $next
is always the
initial bucket value 0
at this stage.
Bug: T294998