[Overview Actions] onBackPressed for the modal state will go to overview.

Test: local
Bug: 157778187
Change-Id: Ie5252d39e54ca11de389dd698bfb7751fdf8f60e

quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/states/OverviewModalTaskState.java

@@ -20,6 +20,7 @@ import android.graphics.Rect;
 
 import com.android.launcher3.BaseDraggingActivity;
 import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherState;
 import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
 import com.android.quickstep.views.RecentsView;
 
@@ -56,6 +57,17 @@ public class OverviewModalTaskState extends OverviewState {
         return 1.0f;
     }
 
+    @Override
+    public void onBackPressed(Launcher launcher) {
+        launcher.getStateManager().goToState(LauncherState.OVERVIEW);
+        RecentsView recentsView = launcher.<RecentsView>getOverviewPanel();
+        if (recentsView != null) {
+            recentsView.resetModalVisuals();
+        } else {
+            super.onBackPressed(launcher);
+        }
+    }
+
     public static float[] getOverviewScaleAndOffsetForModalState(BaseDraggingActivity activity) {
         Rect out = new Rect();
         activity.<RecentsView>getOverviewPanel().getTaskSize(out);

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

@@ -178,6 +178,12 @@ public class TaskOverlayFactory implements ResourceBasedOverride {
         public void reset() {
         }
 
+        /**
+         * Called when the system wants to reset the modal visuals.
+         */
+        public void resetModalVisuals() {
+        }
+
         /**
          * Gets the modal state system shortcut.
          */

quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java

@@ -1759,6 +1759,16 @@ public abstract class RecentsView<T extends BaseActivity> extends PagedView impl
         return Math.max(getWidth(), 1);
     }
 
+    /**
+     * Resets the visuals when exit modal state.
+     */
+    public void resetModalVisuals() {
+        TaskView taskView = getCurrentPageTaskView();
+        if (taskView != null) {
+            taskView.getThumbnail().getTaskOverlay().resetModalVisuals();
+        }
+    }
+
     private void updateDeadZoneRects() {
         // Get the deadzone rect surrounding the clear all button to not dismiss overview to home
         mClearAllButtonDeadZoneRect.setEmpty();