Fix bug where file size would display for folders with false info

Folder size would auto set to 4.10 kB even though that wasn't the total
size of the folder. Now, we don't display size on folders, just number
of children.

Bug: 64084585
Test: In Place
Change-Id: Ia222c64a88ad4c53980fc3112a1a6ffbfbfcab4b