Merge "Enable DirectoryFragment.onRefresh works when there is no root doc."...
Merge "Enable DirectoryFragment.onRefresh works when there is no root doc." into rvc-dev am: b7b46985 am: 3d584cf2 am: b4e8dfec am: 189b253c
Change-Id: I3da058006f4027427dd0d0121fe58c87d8e42052