Merge "Set grid progress even when task count is 0." into tm-qpr-dev am: 82f05a85

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/20508307



Change-Id: I8ef71e65d4eb2a7c9625a83d09360d16559041b5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>