Set KeyboardQuickSwitchView ratio correctly.

This CL sets the thumbnailView ratio correctly in Alt-Tab UI. The currently supported ratios are `SNAP_TO_30_70, SNAP_TO_50_50, SNAP_TO_70_30`. This can be extended when we add more split modes later.

Bug: 328691131
Test: manual in both landscape and portrait mode.
Flag: EXEMPT bugfix
Recall: http://recall/clips/79f3b250-d691-4b03-93c3-825a80478ae0

Change-Id: Idf4f174d1b222a8f3c80e5c6ed17c5bf53d3368c

quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchView.java

@@ -214,11 +214,13 @@ public class KeyboardQuickSwitchView extends ConstraintLayout {
                     groupTask.mSplitBounds == null
                             || groupTask.mSplitBounds.leftTopTaskId == groupTask.task1.key.id
                             || groupTask.task2 == null;
-            currentTaskView.setThumbnails(
+
+            currentTaskView.setThumbnailsForSplitTasks(
                     firstTaskIsLeftTopTask ? groupTask.task1 : groupTask.task2,
                     firstTaskIsLeftTopTask ? groupTask.task2 : groupTask.task1,
                     updateTasks ? mViewCallbacks::updateThumbnailInBackground : null,
-                    updateTasks ? mViewCallbacks::updateIconInBackground : null);
+                    updateTasks ? mViewCallbacks::updateIconInBackground : null,
+                    groupTask.mSplitBounds);
 
             previousTaskView = currentTaskView;
         }