[DO NOT MERGE] Make the cutout slightly smaller

Temporary fix for S. Leaving the bug open for a proper fix in T.

Bug: 189265196
Test: https://screenshot.googleplex.com/75fgCva736rqwg5
Change-Id: Ice3b189a41f759e090334e360e44543eabc4836d

quickstep/src/com/android/quickstep/views/TaskView.java

@@ -1489,6 +1489,7 @@ public class TaskView extends FrameLayout implements Reusable {
         private final float mCornerRadius;
         private final float mWindowCornerRadius;
 
+        public float mFullscreenProgress;
         public RectF mCurrentDrawnInsets = new RectF();
         public float mCurrentDrawnCornerRadius;
         /** The current scale we apply to the thumbnail to adjust for new left/right insets. */
@@ -1506,6 +1507,7 @@ public class TaskView extends FrameLayout implements Reusable {
          */
         public void setProgress(float fullscreenProgress, float parentScale, int previewWidth,
                 DeviceProfile dp, PreviewPositionHelper pph) {
+            mFullscreenProgress = fullscreenProgress;
             RectF insets = pph.getInsetsToDrawInFullscreen();
 
             float currentInsetsLeft = insets.left * fullscreenProgress;