Folder support in Taskbar am: 7ba547cd2d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13545778

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I99af5d109e7259f2a5f0fb5b0bf22f1a5a4500b7