Merge "Ensure page scrolls are initialized even for 0 children." into tm-dev am: 1e211e0c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/18625747



Change-Id: Ib158460fdc41861dfd50a23c7d38ae0153e04af6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>