Arcyd: more detailed profile stats on dashboard

To make it easier to identify where the current bottlenecks are,
instrument the individual methods of abdt_conduit and abdt_branch.

Test Plan:
$ ./precommit.sh
$ ./testbed/arcyd/loop_test.sh
Arcyd: large->small ordering of stats on dash

Make the profiling stats easier to read by ordering them large->small
instead of small->large.

Test Plan:
$ ./precommit
$ ./testbed/arcyd/loop_test.sh