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: Ida61085ead3304a8c1eeb7beacf708b1c8e68e43