Fixes starting window being occluded when enable shell transition

- Fix starting window layer so the layer won't become lower when Shell
is applying finish transaction.
- Fix cannot remove starting window because there were set
mAnimatingExit to true while the window is in transition without apply
exit animation.

Bug: 211045248
Bug: 211844337
Test: enable shell transition, run OpenAppColdTest

Change-Id: Ie05b356048ea2db907704911736f0f93e49eb2e8

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

@@ -2548,10 +2548,8 @@ public class WindowManagerService extends IWindowManager.Stub
         if (win.mAttrs.type == TYPE_APPLICATION_STARTING) {
             transit = WindowManagerPolicy.TRANSIT_PREVIEW_DONE;
         }
-        if (win.inTransition()) {
-            focusMayChange = true;
-            win.mAnimatingExit = true;
-        } else if (win.isWinVisibleLw() && winAnimator.applyAnimationLocked(transit, false)) {
+
+        if (win.isWinVisibleLw() && winAnimator.applyAnimationLocked(transit, false)) {
             focusMayChange = true;
             win.mAnimatingExit = true;
         } else if (win.mDisplayContent.okToAnimate() && win.isAnimating(TRANSITION | PARENTS,

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

@@ -5427,7 +5427,7 @@ class WindowState extends WindowContainer<WindowState> implements WindowManagerP
 
     @Override
     void assignLayer(Transaction t, int layer) {
-        if (isStartingWindowAssociatedToTask()) {
+        if (mStartingData != null) {
             // The starting window should cover the task.
             t.setLayer(mSurfaceControl, Integer.MAX_VALUE);
             return;