[Overview Sharing] Pass the full screen progress to task overlay.

This is to change the alpha value of the suggest view when user swipe down.

Bug: 179514465
Test: local

Change-Id: Idfa66ff6d9bb43f35f859df828a19e3b47abcd65

quickstep/src/com/android/quickstep/TaskOverlayFactory.java

@@ -221,6 +221,12 @@ public class TaskOverlayFactory implements ResourceBasedOverride {
             return null;
         }
 
+        /**
+         * Sets full screen progress to the task overlay.
+         */
+        public void setFullscreenProgress(float progress) {
+        }
+
         /**
          * Gets the system shortcut for the screenshot that will be added to the task menu.
          */

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

@@ -1080,6 +1080,7 @@ public class TaskView extends FrameLayout implements PageCallbacks, Reusable {
         progress = Utilities.boundToRange(progress, 0, 1);
         mFullscreenProgress = progress;
         mIconView.setVisibility(progress < 1 ? VISIBLE : INVISIBLE);
+        getThumbnail().getTaskOverlay().setFullscreenProgress(progress);
 
         updateTaskScaling();