When more than one level deep directory is opened.
Bug: 27090439
Change-Id: I73e789a820af3b710f0981ac12f5ea43cc389cf6
(cherry picked from commit f908640fd0)
Since it was almost all redundant (especially the stack stuff).
Ensure "Files" title present on drawer title in Files app.
DocumentsToolBar > DocumentsToolbar to match toolkit naming.
Bug: 26193264
Change-Id: I92c82c66d936aae3ce0f792581daa12898dfadee