Merge "workspace: get the correct page when setting paddings" into sc-v2-dev am: 653ae0a524 am: 46eaebba86

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15640815

Change-Id: I652ac2aa0b8484e129e186d3576dfb30eb5d2eba