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

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

Change-Id: Ib7e7d00556752123e313b543f27b5a01ce070e5b