Merge "TaskOverlayFactoryGo: Minor updates for testability" into sc-dev am: 6914f93f8e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/13982439

Change-Id: Ib05b5fb3f541d1e53e30c23adb79c069be494fef