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

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

Change-Id: I6c82d5cb59f66893b42c5e0d31dfe277c1710b71