tree 586cd6811b4f88d65afbb48f82fa3641bfd84d7a
parent dfcfc251c8b0fb087f7b9533a137de5441152034
author Matt Jeanneret <mj3580@att.com> 1551371749 -0500
committer Matt Jeanneret <mj3580@att.com> 1551444671 -0500

VOL-1474: Support GetChildDevice

Also add child devices more similarly
to the old core.  Also set root device

Change-Id: I2967030c6afdbe9ce90ef71ac6f23ec9de36ccc8