Use snapshot in enter content-pip animation

When entering content-pip
- We take a snapshot for the host task within the
  ActivityStarter#startActivityInner function, this is to make sure that
  the snapshot is taken before an app switches to the placeholder content
- We retrieve the snapshot in WM Shell when animating the newly created
  content-pip task, and use that snapshot during the animation
- This works similar to the solid color content overlay when app enters
  PiP without specifying a valid source rect hint. Therefore, we
  abstract the functionality to a dedicated PipContentOverlay class

Video: http://recall/-/aaaaaabFQoRHlzixHdtY/dRSTf7prHc0krPhTKZ0kXx
Bug: 220191201
Test: enter content-pip from ApiDemos app, see also Video
Change-Id: I2420402341a910b44bd8f64e3ad518ebef41bc19

1 files changed, 0 insertions, 17 deletions

diff --git a/core/java/android/app/TaskInfo.java b/core/java/android/app/TaskInfo.java
index 1b87945ec985..7910f1a426c2 100644
--- a/core/java/android/app/TaskInfo.java
+++ b/core/java/android/app/TaskInfo.java
@@ -34,10 +34,7 @@ import android.graphics.Rect;
 import android.os.Build;
 import android.os.IBinder;
 import android.os.Parcel;
-import android.os.RemoteException;
-import android.util.Log;
 import android.view.DisplayCutout;
-import android.window.TaskSnapshot;
 import android.window.WindowContainerToken;
 
 import java.lang.annotation.Retention;
@@ -355,20 +352,6 @@ public class TaskInfo {
         return isVisible;
     }
 
-    /**
-     * @param isLowResolution
-     * @return
-     * @hide
-     */
-    public TaskSnapshot getTaskSnapshot(boolean isLowResolution) {
-        try {
-            return ActivityTaskManager.getService().getTaskSnapshot(taskId, isLowResolution);
-        } catch (RemoteException e) {
-            Log.e(TAG, "Failed to get task snapshot, taskId=" + taskId, e);
-            return null;
-        }
-    }
-
     /** @hide */
     @NonNull
     @TestApi