Merge "Renaming TaskbarController to LauncherTaskbarUIController" into sc-dev am: 749f55f07a am: 9e1b279f3b am: d55f44db76

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14626089

Change-Id: I570356ee63738387a5db6a7174ec1ccd3642bc85