Merge "Add left widget panel to Launcher home when unfolded" into sc-v2-dev am: 71954b7ec5 am: efe9f10684

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14745702

Change-Id: Idad5ddbdd61d540c2d85fc107cc36439dcd6205b