Fix switch task flicker from reveal animation.

While prepareing reveal animation in core, the initial position will be
set to 0,0 even when the window is shift by other insets.
- Only splash screen need to apply reveal animation, so ignore the
animation when removing task snapshot starting window.
- Set the initial position after the animation leash just created.

Fixes: 192333159
Test: Rotate device to landscape then use task switch to launch apps,
testing for both hot and cold launch.

Change-Id: I82d78822e0a44350a49ac4cee105f10790014982

services/core/java/com/android/server/wm/ActivityRecord.java

@@ -2252,6 +2252,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         }
 
         final WindowManagerPolicy.StartingSurface surface;
+        final StartingData startingData = mStartingData;
         if (mStartingData != null) {
             surface = mStartingSurface;
             mStartingData = null;
@@ -2278,7 +2279,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         final Runnable removeSurface = () -> {
             ProtoLog.v(WM_DEBUG_STARTING_WINDOW, "Removing startingView=%s", surface);
             try {
-                surface.remove(prepareAnimation);
+                surface.remove(prepareAnimation && startingData.needRevealAnimation());
             } catch (Exception e) {
                 Slog.w(TAG_WM, "Exception when removing starting window", e);
             }

services/core/java/com/android/server/wm/SnapshotStartingData.java

@@ -40,6 +40,11 @@ class SnapshotStartingData extends StartingData {
                 mSnapshot);
     }
 
+    @Override
+    boolean needRevealAnimation() {
+        return false;
+    }
+
     @Override
     boolean hasImeSurface() {
         return mSnapshot.hasImeSurface();

services/core/java/com/android/server/wm/SplashScreenStartingData.java

@@ -58,4 +58,9 @@ class SplashScreenStartingData extends StartingData {
                 mLogo, mWindowFlags, mMergedOverrideConfiguration,
                 activity.getDisplayContent().getDisplayId());
     }
+
+    @Override
+    boolean needRevealAnimation() {
+        return true;
+    }
 }

services/core/java/com/android/server/wm/StartingData.java

@@ -47,6 +47,11 @@ public abstract class StartingData {
      */
     abstract StartingSurface createStartingSurface(ActivityRecord activity);
 
+    /**
+     * @return Whether to apply reveal animation when exiting the starting window.
+     */
+    abstract boolean needRevealAnimation();
+
     /** @see android.window.TaskSnapshot#hasImeSurface() */
     boolean hasImeSurface() {
         return false;

services/core/java/com/android/server/wm/TaskOrganizerController.java

@@ -197,6 +197,7 @@ class TaskOrganizerController extends ITaskOrganizerController.Stub {
                                 ANIMATION_TYPE_STARTING_REVEAL);
                         windowAnimationLeash = adaptor.mAnimationLeash;
                         mainFrame = mainWindow.getRelativeFrame();
+                        t.setPosition(windowAnimationLeash, mainFrame.left, mainFrame.top);
                     }
                 }
             }