setAllAppWinAnimators() for closing apps.

This makes sure the app windows get onExitAnimationDone() call when
the animation is done vs. when the activity is stopped which happens
later.

Bug: 64218925
Test: go/wm-smoke
Change-Id: Ia3bd5efb0cc9713758f1b4ca4765b4bd5e19542d

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

@@ -449,6 +449,9 @@ class WindowSurfacePlacer {
             //       animating?
             wtoken.setVisibility(animLp, false, transit, false, voiceInteraction);
             wtoken.updateReportedVisibilityLocked();
+            // setAllAppWinAnimators so the windows get onExitAnimationDone once the animation is
+            // done.
+            wtoken.setAllAppWinAnimators();
             // Force the allDrawn flag, because we want to start
             // this guy's animations regardless of whether it's
             // gotten drawn.