Merge "Renaming TaskbarController to LauncherTaskbarUIController" into sc-dev am: 749f55f07a am: f6a895edad am: 52d26b4ee1

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

Change-Id: I72c123a8f9259857d61a2aefcb486f1b369f3d8f