Merge "Make BaseIcon.Workspace so that it can be overriden." into sc-dev am: 8a51f11b63 am: 8fb35f18f7

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14754618

Change-Id: Ia57e84aa0e3cf3901383088c6a8bfe2036cfd061