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

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

Change-Id: I8bd4fb7d38d81f2a3f5ea3ce7bd5c230f6cdf7b4