Merge "Add FolderSpec for responsive grid support" into udc-qpr-dev am: b1dc7718

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23586620



Change-Id: I04fe8d4a63971d9b1d0e2956157a8e3a2a46ddfc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>