Fix hotseat width to span a number of columns am: 828875cd12

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17983445

Change-Id: Ia462205bfb1ea81a8a83d7f6b522d196ccf8bc45
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>