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

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

Change-Id: I6cf9a3fec22e7754b8986fb93a2914fda38017d6