Revert "Renaming TaskbarController to LauncherTaskbarUIController"

This reverts commit 40a7421619.

Reason for revert: DroidMonitor-triggered revert due to breakage https://android-build.googleplex.com/builds/tests/view?invocationId=I13700009003387451&testResultId=TR89423459137251402, bug https://buganizer.corp.google.com/issues/188755902

Bug: 188755902
Change-Id: Icd1ddd43e62d392f6b68b0150a1075f73106391a

quickstep/src/com/android/launcher3/uioverrides/QuickstepLauncher.java

@@ -165,7 +165,7 @@ public class QuickstepLauncher extends BaseQuickstepLauncher {
     @Override
     public boolean startActivitySafely(View v, Intent intent, ItemInfo item) {
         // Only pause is taskbar controller is not present
-        mHotseatPredictionController.setPauseUIUpdate(getTaskbarUIController() == null);
+        mHotseatPredictionController.setPauseUIUpdate(getTaskbarController() == null);
         return super.startActivitySafely(v, intent, item);
     }
 
@@ -233,9 +233,9 @@ public class QuickstepLauncher extends BaseQuickstepLauncher {
     @Override
     public void bindWorkspaceItemsChanged(List<WorkspaceItemInfo> updated) {
         super.bindWorkspaceItemsChanged(updated);
-        if (getTaskbarUIController() != null && updated.stream()
+        if (getTaskbarController() != null && updated.stream()
                 .filter(w -> w.container == CONTAINER_HOTSEAT).findFirst().isPresent()) {
-            getTaskbarUIController().onHotseatUpdated();
+            getTaskbarController().onHotseatUpdated();
         }
     }