Renamin TaskbarContainerView to TaskbarDragLayer

Bug: 187353581
Test: Presubmit
Change-Id: I9164a956aaa896111f287ab4e97b091a7d4d30ee
diff --git a/quickstep/res/layout/taskbar.xml b/quickstep/res/layout/taskbar.xml
index c436221..e680233 100644
--- a/quickstep/res/layout/taskbar.xml
+++ b/quickstep/res/layout/taskbar.xml
@@ -14,7 +14,7 @@
      limitations under the License.
 -->
 
-<com.android.launcher3.taskbar.TaskbarContainerView
+<com.android.launcher3.taskbar.TaskbarDragLayer
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/taskbar_container"
     android:layout_width="wrap_content"
@@ -52,4 +52,4 @@
         android:layout_height="wrap_content"
         android:visibility="gone"/>
 
-</com.android.launcher3.taskbar.TaskbarContainerView>
\ No newline at end of file
+</com.android.launcher3.taskbar.TaskbarDragLayer>
\ No newline at end of file